Trying to weld an item to a player but it wont run anything and gives 0 errors, why?

I just want to weld a basic part onto a player (the part already has a weld with all the proportions btw) but for some reason i cant see the part on the player and if i look in the Explorer its not parented either, can someone please help me out

local ServerStorage = game:GetService("ServerStorage")


wait()
local Release = ServerStorage:WaitForChild("SoulRelease")
local Clone = Release:Clone()
Clone.Weld.Part1 = script.Parent:WaitForChild("LeftArm")
Clone.Parent = script.Parent

Server Script in StarterCharacterScripts

C0 and C1 could be the issue simply because they are used for offsets. Use a WeldConstraint instead because Part1 is always glued at Part0's. Therefore, LeftArm should be Part0 and Clone should be Part1. Don't forget to position Part1 to Part0.

If that still won't work, It's probably because your character is R15.

local ServerStorage = game:GetService("ServerStorage")
local Character = script.Parent

local Release = ServerStorage.SoulRelease
local Clone = Release:Clone()
Clone.Parent = Character
Clone.Weld:Destroy()

local weldConstraint = Instance.new("WeldConstraint", Character:FindFirstChild("LeftArm") or Character:FindFirstChild("Left Arm") or Character:FindFirstChild("LowerLeftArm"))
weldConstraint.Part0 = weldConstraint.Parent
weldConstraint.Part1 = Clone
Clone.Position = weldConstraint.Part0.Position