Is the wire marked 16AWG or 18AWG? Can't quite see from the photo. Have you worked out what the different wires do?
The wire is 18 AWG according to the markings and I have worked out that the wires make the tail lights work 😁. My experience was much like RedThree had, it turned into a major job with the alloy liner removed and re-jigging the boot lid hinge. Solder heat shrink sleeve wire connectors are ideal for this job.
