Look at diagram A at top right of page and find your neutral safety swtich
On this diagram, they show the wires are black and black with tr, they physically come up over the top of the transmission, there may be a second connector somewhere, and go into the bulkhead connector. On this diagram they are calling them "C" and "D" of the connector. From there they go into the interior, where one wire runs back with the tail /turn harness to the lamps, the other goes to the fuse box, I believe the radio fuse
Also, you can download various factory service manuals from here: