Rally dash redo

By the looks of schematic, the rear pillar lights are "fed" from #2 cavity (18-BK), at bottom of schematic where it says "To Body wiring"
Might have to look at your original harness and see where the pink wire from that connector may lead to. Somehow it has to connect up with a wire from that fuse. Maybe the junction is at the T shaped connector instead of at the headlight B2 terminal.