Mopar performance alternator 1or 2 wire???

Not sure if this is what you are doing, but generally if you are switching from a 1 wire (single field) round alternaror to a 2 wire (2 field) square back alternator, the second field wire jumps to ground on the alternator. Do a Google search on the subject to be sure.

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PS: Now that I look at your picture, it looks as though they already grounded the second field wire for you. Bolt in on and go !