Brown wire From Transmission

On my 1968 Chrysler Newport Custom I have been trying to figure out why it won't start. I replaced the starter relay, there are no fried wires, and I found a brown wire coming from the transmission that isn't connected to anything but the neutral safety switch on the transmission, it was cut and there is no other exposed wires anywhere. Please help this might be the problem does anyone know where it goes to or have a wiring diagram I can go off of.
Author: mrzods13