All good. Sorry can't help you with the Alternator as i run a 120amp Holden Item and the wiring is modified, but, it should be one plug a white wire the same thickness of the one that went to the starter and a Black one.
The back one goes to the body ot the alternator
The white one bolts onto the only stud sticking out of the alternator.
The plug is pretty simple.
See how you go, maybe someone else has a photo.