68 Dart wiring questions

We are working on my uncles 68 Dart. For now just trying to get it running and moving before we worry about what’s ‘correct’.

My first question is can I use an alternator with 2 (I assume) field terminals when his car only has wiring for one (green.) I have that alternator and we are hoping to have a charging system while we try to keep the motor running long enough to tune on it a bit.

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