OK, let's see if I have this right. The wire from the relay (on the firewall) to the starter solenoid gets cut and routed to the neutral safety switch and then back to the starter solenoid. If the trans is in neutral, the current goes through neutral start switch and allows starter to turn. If not in neutral, switch allows no current and no start. Is that how it works?

Is all I need is the center post with a wire from the firewall relay to the neutral start and then on to starter solenoid. Or does the wire from the firewall relay go to the power pole on the neutral start and then a wire from center pole to solenoid? Seems like I need a wire in and a wire out if it works like a switch? I am confused....