How to calculate an angle to point at a Vector3 cordinate?

How would we calculate an angle to point at a Vecotr3 Position --Specificaly to be used in a 6D motor

What not many people know is that CFrame.new() has 2 arguments, one is the place where your part is pointing.

Part.CFrame = CFrame.new(Vector3.new(x, y, z), Part2.Position) -- Points part
for i,v in pairs(Model:GetChildren()) do
	if v:IsA("BasePart") then
		local Weld = Instance.new("Weld", v)
		Weld.Part0 = v
		Weld.Part1 = Part2
		Weld.C0 = v.CFrame:inverse() * Part2.CFrame --Re-welds the part, in the exact position it is now.
	end
end