where is neutral safety switch

Ok I studied the car and harness. I am sure the harness is wrong so I am going to make my own. I will run 1 wire to starter relay. 2 wires to the reverse lamp wires.
I crawled all over under the dash and couldn't find the purple and white wires coming in to connect to. That is the only thing I have to find now is where to connect to the reverse lamp wires.