If you're looking at the connector at the "Y" terminal on the alternator stator -- that one doesn't go anywhere. It's the common point of the three stator coils. If there is a difference at the regulator you'll have to wait for more answers -- I don't remember there being any different, but I'm old and forgetful.
Installation tip -- install the stator with the brushes in the ~10:00 position. Urban legend has it that the brushes don't bounce so much at that angle and so the charging is better.