I'd like to completely remove my fog lights, leaving just the wires, in preparation for painting and so I can clean them up on the bench. I'm not sure I see how the wires disconnect and would prefer not to cut them. Any tips?

Using a little flat blade, unscrew set screw on bulb holder, be careful not to loose it. Pull out white/yellow wires (solder on ends). Slide off brown ground wire. Pull rubber plug out the housing.

So pull the wires out of their solders, right?

The tip of the + wire(s) is soldered but that soldered tip should be held in place by a set screw. Loosen it and it will slip out. Then just pull the spade connector off the ground terminal. Those wires look awfully new for a 50 YO car. Show us the other side of the bulb socket you are holding. Could be a PO did something a little differently when replacing those yellow/while wire(s).

The set screw was right where you said it'd be and the wires popped right out. Without glasses, didn't notice it.
Thanks for your help.