I'm trying to rewire a couple of identical antique lamps. Unfortunately, I don't have a clear idea of which wire is which. The lamp has been rewired in the past, but it seems it was a long time ago.
There are two wires, which are copper with a clear, yellow-ish rubber insulation. They're exactly the same except for one difference: One wire has a rounded side, while the other is squarish. There is no ridging, and there is no way for me (an amateur) to tell the difference. They have absolutely no other markings aside from what I've described above.
Any help would be appreciated.
Edit: I've managed to identify which wire is which.