yet another Altenator wiring question.. need help

alright, so I checked this today, and the blue wire and the black wire (battery stud on altenator) are wired to the center bulkhead connector, which looks like it is supposed to be by the diagram, but the green wire which went to the old regulator plug, was cut off when the electronic ignition went in, so it isn't run to anything. Where should this go, I have a 5th wire on the new regulator, but the instruction said it isn't used. Any suggestions?