Mopar performance alternator 1or 2 wire???

Out of curiosity, what’s the typical issue with the bulkhead connectors? Just rewired the car with a ron Francis kit but kept the bulkhead connector. Took it apart and installed new terminals in it but kept the bulkhead connector to maintain separate wire harnesses between dash and engine.

Will that solve the problem? Plan on putting a more powerful alternator on later to power electric fans and such
What year car?
And how was it optioned, electrically?
Yes it makes a difference