charging system blues

a different question- hands are dirty while i type- on the back of the double pulley alt coming off it has a batt wir & 2 fields. on back of single pulley alt going on it has a batt, a field and a ground. ? the hot when key on double blue field would go to the field spade, batt wire to batt, green field go to the ground position ? hope i'm being clear. wanted to go to single pulley cause of a/c remove before us.