It’s only 2 wires(only reverse switching). Also you need the pin that sticks up to actuate the switch. My ‘68 column had that hole that the pin inserts into.
This is exactly what mine has. I have gone through and figured out my wiring. I will PM and get this spare from you just in case. I am starting a thread on the reverse light and NSS wiring in the 66/67 forum now.Here's what I have. Works perfect. Bracket is for a 66 C body. $50 and shipping. View attachment 1845858View attachment 1845859