Mopar performance alternator 1or 2 wire???

Mancini has this alternator which states that it is 1 wire compatible but I have a later 2 wire external voltage regulator. The pic shows another terminal with a wire from inside it hooked up. IE a ground, I guess. Can I disconnect that wire and hook up the other wire?
They are having a sale till the 14th and I wanna get it but this got me stumped on weather it would work.
Thx for the input. I'm sure someone will know!