Most of the pigtails that they sell at the parts house for GM integrated alternators have the lead from the 1 pin setup to hook on the Batt stud on the alternator.
You most likely will have to put a diode in the exciter wire that goes to the ignition if it doesn't go though an idiot lite. Otherwise the alternator will backfeed the switch and the engine won't shut off.
The last time I installed one of those alternators I used one of these plugs.
http://www.autozone.com/autozone/par...er=342372_0_0_ Any parts store should have one in the brand that they carry if you don't have one off a doner car.