Alternator

I cannot see what you are referring to. The picture you posted shows no regulator. NO Mopar aternator was ever "built in" although there are aftermarket (Powermaster) "hang on" regulators, that are a small rectangular box which bolts somewhere onto the alternator case, on OUTSIDE.

That last is not production, is not "normal," is a 3rd party deal

What/ where is the green wire and where does it go?

Someone may have incorrectly "converted" it to an earlier 69/ earlier regulator

Your 70/ later regulator should look like this, that is, the one that belongs on the car:



A 69/ earlier can look like "several"



Some replacements are in a shorter case, and are solid state



Aftermarket replacement, can be used on 69/ earlier, or on 70/ later by grounding one field terminal