Ok, I thought the internal had one wire. The one I got from Summit claims to be an external and the plug is on the back.

http://store.summitracing.com/partdetail.asp?autofilter=1&part=SUM%2D812102&N=700+0&autoview=sku

So, it sounds like the external regulator should work. It just won't put out 80 amps. True?