How should i substitute handles in tools?

I'm trying weld, but i'm not doing very well. How should i weld a part of the tool to the hand? (without naming it handle)

1. Below constraints there should be a drop down thing that says "join".

2. You want to click that and then it should drop down and then click "Always".

3. Then connect the parts.

projectile.MainPart.Touched:connect(function(part)
	if part.Parent:FindFirstChild("Humanoid") then
		print("Target has a humanoid!")
		if not part.Parent = hum.Parent then
			print("Not my character!")
			if checkHit(part.Parent, hit) then
				print(4)
				local EnemyCharacter = part.Parent
				if damage then
					print(5)
					eventDamage(nil,char2,damage)
				end
			end
		end
	end

tell me where it reaches and what happens