o2 sensor

There is a black wire with a white stripe running to the engine control module from the o2 sensor ,but it is factory spliced into the nutral safty switch. Doe's the lead to the nutral safty switch need to be connected and if so to what?
I have finally gotten everything wired in this truck but that, and if I dont need it. I am back on the road
There was an electronic shift transmission in it before, now it has a AOD instead of a E4OD. So I had a lot of trouble doing the wiring to get things right
I modified the 460 wiring harness to fit the 302
and I built the 302 distributer out of the one from out of the 460.
and yes I still had to change the engine cortrol modual because it was
running to rich for the 302. after all that it runs great.
So if i could get some help with this wiring I'll be done. thanks to all that have helped out
PS
I got 2 manauls chilton and haynes nether one tell anything about tranny wiring or the wiring for the nutral safty switch. and my truck is 1989 F350
and the motor and trans are 1987 E150 if that is needed