What you have there is a 70/ later alternator. That uses a different VR BUT YOU can easily use it on your older vehicle.
FIRST MAKE CERTAIN that the two field (spade) connectors are OPEN to GROUND. This is because many rebuilds come IN correctly assembled, or with insulators left out of the field/ brush assemblies
If the field is open (infinity) to ground, simply pick either and wire it to ground. Connect a short jumper wire with a female spade to a ground screw. ALTERNATIVELY remove the insulator and replace it with a washer. Some work well that way and others are more difficult. In any case ground one field, then connect it as you would have your old one.
