Non Mopar alternator question

We are just getting my buddies race car running, he bought it with a hurt engine which has now been fixed. We have no alternator output and I am wondering if anyone can help me. The large hot lead goes to the battery and has 12 volts to it, but the two "spade" connectors have nothing going to them. I am guessing that the alternator has never worked since it was installed as I suspect the "turn on" or "energize" wire is missing. The car has dual batteries and in the past always had a charger on it between rounds.

My questions are;

1 - can anyone identify this alternator?
2 - does anyone know how to wire it correctly?

I tried putting 12 volts to the two spade terminals, one at a time with the car running. One had no effect on the output, the other one resulted in 13.8 volt output, but significant laboring of the engine at idle leading me to wonder if there is an issue, or the batteries are just low and requiring a lot of amps to charge.

Ideas / suggestions?