Starter wiring?

[Jeepwm69]

Took the starter off of Dad's 83 GMC, 305, SM465 tranny. There was one big terminal in the middle of the solenoid that had two rings/wires on it, and ONE smaller terminal on the drivers side of the solenoid that had a small wire going to it.

The replacement starter I got from autozone had the main terminal on the solenoid, but TWO smaller terminals, one on either side of the big one. I put the small wire first on the drivers side terminal (nothing) and then moved the small wire to the other small terminal (still nothing).

Drove 25 min to the nearest autozone to see if they had another part #, and they didn't.

Anyone know why the original starter only had two posts on the solenoid while the new one has 3? How do I wire this thing?

Thanks