Unfortunately, at least until Spring, I can't address whether the Trunk Light wire is taped ONTO, or INTO the taillight harness. My '67 is hibernating for the Winter at its Southern Colorado Vacation/ Retirement house, almost 700 miles away. I will check out the remainder of the harness when we go back and post my findings.
For now, there are a couple of things that I can address. The trunk light wire is taped TO the taillight harness at the front of the rear inner fender well. In front of that, I'll need to check later. My wire is black, and appears to have a heavy insulation on it; it does not appear to have the woven cloth covering that John's example has (although it could be missing on my exposed wire and may show up when I investigate the complete harness). Marty, what is your wire like ?
Finally, and this is kind of interesting, in John's example from the 7F01C129xxx, note that the end has both the female bullet connector for the wire from the Trunk Light socket, and a male bullet pigtail. Mine only has the female bullet connector. What about yours Marty ?
As noted before, the Assembly Manual isn't of much help here. It does, however, show the wire as being covered with the woven cloth and taped every 12", but does not show any kind of connector, much less pigtails.
Initially, I thought this might be a Plant variation, but John's example is from Dearborn, which is where mine was built. So that leaves a possible "early versus late possibility. Mine was built 01/31/67, which is still considered early (pre 02/02/67). John, do you know the build date on the harness from the 7F01C129xxx ? And Marty, at which Plant was yours built ?
I guess that's about all I can "muddy up" for now.
Bob