[mr0077]

OhBouy, what kind of starter do you have? With 3 terminals, it sounds like a GM-type, with solenoid mounted on starter motor...?
On my mini starter setup, I have the firewall solenoid triggered by the starter switch, which sends power to the starter. I have a jumper at the starter, from the big (positive) terminal to the solenoid coil terminal, to trigger the starter solenoid when power is applied from the firewall solenoid to the big (power) terminal on the starter solenoid. Not authentic, but just as effective (maybe more so), the starter switch could be wired direct to the starter solenoid trigger terminal, if you have a starter-mounted solenoid. LOL, hope that helps...