How do I get the position of a changing UI?

Hello, I'm currently modifying some code in a gun so that when the player's bullet hits someone, the hit marker is centered around the mouse marker (in third person). However, it's not being centered. Here is the code.

Player.PlayerGui.MainGui:WaitForChild("HitMarker").Visible = true
		Player.PlayerGui.MainGui.HitMarker.Position = Player.PlayerGui.MainGui.FakeC.Position

FakeC is the mouse marker, and the HitMarker is the hit marker itself. The HitMarker is an imagelabel and FakeC is a TextLabel. If someone could help me on this, it'd be great. Thanks!