Where should I place a server script that functions on Join?

Here's my script;

local Players = game:GetService("Players")


local function onPlayerAdded(player)
    local ability = player:WaitForChild("Status"):WaitForChild("Ability")
    if ability.Value == "None" then
        return
    end
    if ability.Value == "Magnet" then
        local Clone = game.ReplicatedStorage:WaitForChild("MagnetPunch"):Clone()
        Clone.Parent = player.Backpack
    end
end

for _,player in pairs(Players:GetPlayers()) do
     onPlayerAdded(player)
end

Players.PlayerAdded:connect(onPlayerAdded)

It won't function so I don't know. There were no errors so I'm guessing I placed it in the wrong place. Where should I place it and if there are any errors please tell me.