I have a 1975 Bethany compact 560 and the plug was cut off prior to my ownership. The 5 wires for the plug are completely different from the color wires going to the lights. A five wire cable runs through the walls and the lights splice off of that one cable. But I can’t tell what color goes to what light. I have tried applying voltage to each wire individually to see what lit up but only two worked and both lit up the markers and tail lights.