On the version in the '67 Barracuda TSB the back up wiring is drawn with both the automatic and the manual transmission options. Whichever is not on the car has to be erased. Since this car has a console automatic, the B/U feed wire does not go to cavity H. Likewise there is no return to the bulkhead conector because the switch inside. Illustration
For 67 the instrument lamp connection is near the flasher (ashtray) and the B/U connector is near the bulkhead multiconnector.
Photos New wiring for our ‘67 B’cuda