No crank from key.

I was totally clueless when I started all this and I've really leaned a lot from this forum. I will try and ground the relay and see what happens. I am curious though... does the NSS need power going to it then send power to the relay? If there is no power coming from the NSS wire. Is that a problem?
For the neutral safety portion, it's just a ground. Having the trans in park/neutral completes the circuit and grounds the relay.

The wiring goes up and through the bulkhead connector, so there's opportunity for a broken or cut wire, or bad nss.

Unhook the nss connection at the relay, ground the terminal and try to crank it, it's probably a bad relay/nss.