I was thinking reverse lamp wires in my 67 were violet and violet w/white tracer but again my memory fails. That could have been the colors for later trans mounted NSS/reverse switch.
Might be.
Looking at it the other day, I was wondering if the same dash harness was used for both automatics and manuals.
Mine was originally automatic with column mounted switch. But it looked like the wires to the connector are long enough to be removed and placed in the bulkhead.
I didn't think to try that when I put the jumpers in.
Jumpers in the photos added by me for transmission mounted reverse switch.
Blue and white to the connector.
Both switch switch wires are violet to connector.