"...sheesh...Now, you are correct. What I saw was the engine wiring harness."
Guess I got fooled, too
! Unless you got a real clear picture of it the part that attaches the throttle bellcrank on the carb looked like the pressed-on end of a late '60s-early '70s throttle cable, and would have routed through the firewall roughly in the same area that the wiring harness was showing up. As usual, sometimes more info is needed - in this case it would have helped to know that the car had the OD setup.
How about posting the ROTs and window sticker so we can see how it was listed as being optioned? And what were the codes on the data plate?