We are all at different levels & I am regularly awed by the skill level/knowledge of the guys here & I learn more every day. There will be one terminal on the nss with a wire that goes back to the side of the trans. You would jump from this male terminal on the nss itself several inches to the base mounting bolt on the nss effectively permanently grounding it. When it's functioning, putting the trans in N or P grounds this wire at the other end at the trans, you're just doing the same thing(& permanently)upstream at the nss which is why it would now start in any gear as the trans is no longer controlling the grounding. EDIT those later nss's have way more connections than the 70's basic 4 terminal ones so ID them carefully.