How do I get a certain player mouse?

So I'm making a turret, a switch has to be stepped on in order to activate the turret, the turret will always look at the player's mouse. But how do I get the mouse of the player that stepped on the button instead of getting everyone's mouse? Here is the script that makes the turret follow the mouse (Everyone's mouse?)

This Script is not a LocalScript, and it is inside Workspace.

function FollowMouse(p)
    script.Parent.ControllableTurret1.ActivatePart.Touched:connect(function()
        repeat wait() until game.Workspace.ControllableTurret1.TestingCannon.SpinningPart.Base
        while true do
            local pos
            local player = game.Players.LocalPlayer
            local m = player:GetMouse()
            local t = m.Hit
            if t then
                pos = t
                local base = game.Workspace.ControllableTurret1.TestingCannon.SpinningPart:WaitForChild("Base") 
                local h = player.Character:WaitForChild("Head")
                base.CFrame = CFrame.new(base.Position,Vector3.new(t.X,t.Y,t.Z))
                --tor["Neck"].C0 = CFrame.new(0,1,0) * CFrame.Angles(-math.asin((m.Origin.p - m.Hit.p).unit.y) + 1.55,3.15,0)
            end
            wait()
        end
    end)
end

FollowMouse()

^Also this Script is disabled^, an another script would activate this script. If you want to see that script as well, here it is:

local effectPart = game.Workspace.ControllableTurret1.EffectPart
local activePart = game.Workspace.ControllableTurret1.ActivatePart
local sp = script.Parent
local followMouse = game.Workspace.FollowMouseScript
local fireballControl = sp.FireballControl

local buttonPressed = false
--Store whether the button is pressed in a local variable
activePart.Touched:connect(function(hit)
    if not buttonPressed then
    -- Is it not pressed?
        buttonPressed = true
        -- Mark it as pressed, so that other handlers don't execute
        if hit.Parent and activePart.BrickColor ~= BrickColor.new("Sea green") then
            local hum = hit.Parent:FindFirstChild("Humanoid")
            if hum and effectPart.BillboardGui.StatusText.Text ~= "COOLDOWN" or hum and effectPart.BillboardGui.StatusText.Text ~= "ACTIVATED" then
                activePart.BrickColor = BrickColor.new("Sea green")
                effectPart.BrickColor = BrickColor.new("Sea green")
                effectPart.BillboardGui.StatusText.Text = "ACTIVATED"
                effectPart.BillboardGui.StatusText.TextColor3 = Color3.new(0,255,0)
                activePart.Active:Play()
                game.Workspace.ControllableTurret1.TestingCannon.SpinningPart.Base.Material = "Neon"
                game.Workspace.ControllableTurret1.TestingCannon.SpinningPart.Barrel.Material = "Neon"
                activePart.ParticleEmitter.Enabled = true
                sp.CannonStuff.Ammo.Visible = true
                sp.FireballControl.Disabled = false
                followMouse.Disabled = false
            end
        end
        wait(10) -- Amount of time before it deactivates again.
        activePart.BrickColor = BrickColor.new("Cool yellow")
        effectPart.BrickColor = BrickColor.new("Cool yellow")
        effectPart.BillboardGui.StatusText.Text = "COOLDOWN"
        effectPart.BillboardGui.StatusText.TextColor3 = Color3.new(255,255,0)
        activePart.Deactive:Play()
        game.Workspace.ControllableTurret1.TestingCannon.SpinningPart.Base.Material = "SmoothPlastic"
        game.Workspace.ControllableTurret1.TestingCannon.SpinningPart.Barrel.Material = "SmoothPlastic"
        sp.CannonStuff.Ammo.Visible = false
        activePart.ParticleEmitter.Enabled = false
        activePart.ParticleEmitter2.Enabled = true
        sp.FireballControl.Disabled = true
        followMouse.Disabled = true
        wait(7) -- Cooldown
        activePart.BrickColor = BrickColor.new("Dark stone grey")
        effectPart.BrickColor = BrickColor.new("Dark stone grey")
        if sp.CannonStuff.Ammo.Amount.Value > 0 then
            effectPart.BillboardGui.StatusText.Text = "AVAILABLE"
        elseif sp.CannonStuff.Ammo.Amount.Value == 0 then
            effectPart.BillboardGui.StatusText.Text = "NO AMMO, AVAILABLE."
            effectPart.BillboardGui.StatusText.TextColor3 = Color3.new(255,0,0)
        end
        activePart.ParticleEmitter2.Enabled = false
        effectPart.BillboardGui.StatusText.TextColor3 = Color3.new(255,255,255)
        buttonPressed = false
        -- Mark it as not pressed, so other handlers can execute again
    end
end)

^This script is inside a GUI. (That is inside StarterGUI)^ And it's a Script, not a LocalScript.