Thank you so much!! That helps tremendously! I think you pretty much answered all of them for me. I should have known the one for the 3 on back of circuit board. I forgot about that one. I was confused on wiper plug, but after looking closer after your response, I saw that it has one empty slot and fits!
The only thing I’m worried about with my light switch is if the builder put the wires into the body of the harness in the wrong orientation
I pick up a reproduction radio tomorrow. I got a speaker the other day. I’m assuming that 2 of the wires might be for it
Again, thanks a million