Reverse light

The bulkhead connector each wire hole is labelled with a moulded in letter. Look at the 69 schematic shown in your thread where the green is drawn on the wire trace that stops at the bulkhead connector on the drawing. Every wire goes into its own square on this bulkhead with each square or wire cavity having a letter A thru Z except letter i which looks like a 1. That one that goes into letter C, or Cavity C. On the interior side it says WHITE-TR. That more than likely means its a white wire with a black tracer stripe. Probably the bottom row at the bulkhead connector. You want to splice it into that existing white wire with the tracer, that wire is what goes back to the reverse lamps.