how to make this server sided i cant get it to WORK?

local workspace     = game:GetService("Workspace")
local storage       = game:GetService("ReplicatedStorage")
local runService    = game:GetService("RunService")
local players = game:GetService("Players")


local character        = script:FindFirstAncestorWhichIsA("Model")
local player           = players:GetPlayerFromCharacter(character)
local part = script.Parent:WaitForChild("Part")
local goalPart      = part
local character     = script.Parent.Parent
local Torso = character:WaitForChild("Torso")
local RightArm = character:WaitForChild("Right Arm")
local LeftArm = character:WaitForChild("Left Arm")

local rightShoulder = Torso:WaitForChild("Right Shoulder")
local leftShoulder = Torso:WaitForChild("Left Shoulder")
local solveModule   = storage:WaitForChild("SolveIK")
local solveIK       = require(solveModule)

local rightclone = RightArm:Clone()
rightclone.Parent = character
rightclone.Name = "RClone"
rightclone.Transparency = 1
rightclone.Color = RightArm.Color
motor6_right = rightShoulder:Clone()
motor6_right.Part0 = Torso
motor6_right.Part1 = rightclone
motor6_right.C0 = motor6_right.C0
motor6_right.Parent = Torso
-----------------------------
local leftclone = LeftArm:Clone()
leftclone.Transparency = 1
leftclone.Color = LeftArm.Color
leftclone.Parent = character
leftclone.Name = "LClone"
motor6_left = leftShoulder:Clone()
motor6_left.Part0 = Torso
motor6_left.Part1 = leftclone
motor6_left.C0 = motor6_left.C0
motor6_left.Parent = Torso


local function cleanRotation(joint)
    joint.C0 = CFrame.new(joint.C0.p)
    joint.C1 = CFrame.new(joint.C1.p)
end


cleanRotation(motor6_left)
cleanRotation(motor6_right)


local SHOULDER_C0_CACHE     = motor6_right.C0
local ARM_LENGTH            = RightArm.Size.Y - 0.5
----------------------------------------------------
local SHOULDER_C0_CACHE2    = motor6_left.C0
local ARM_LENGTH2           = LeftArm.Size.Y - 0.5

----
part.Changed:Connect(function()
runService.Heartbeat:Connect(function()
    local shoulderCFrame = Torso.CFrame * SHOULDER_C0_CACHE
    local shoulderCFrame2 = Torso.CFrame * SHOULDER_C0_CACHE2
    local goalPosition = goalPart.Value 
    local planeCF = solveIK:solveIK(shoulderCFrame, goalPosition, ARM_LENGTH)
    local planeCF2 = solveIK:solveIK(shoulderCFrame2, goalPosition, ARM_LENGTH2)
    local correction = CFrame.Angles(math.pi/2, 0, 0)

    motor6_right.C0 = Torso.CFrame:toObjectSpace(planeCF * correction)
    motor6_left.C0 = Torso.CFrame:toObjectSpace(planeCF2 * correction)
end)

runService.Stepped:Connect(function()
    motor6_right.Transform = CFrame.new()
        motor6_left.Transform = CFrame.new()
    end)
end)