96 cavalier tranny swap with a 94 sunbird

the tranny in my 96 cavalier went useless. so i pulled the engine/tranny out and removed the tranny... then i put a tranny on from what i believe was a 94 sunbird. the tranny fits beautifuly, it is the same size and shape as the one that came off. the bolts all line up and it fits beautifuly ... only the electricaly wiring jack on it doesn't match the one from the old tranny and therefore i can't plug it into my cavalier. the wiring harness is a different shape and the number of pins are different...
is there any remedy or did i just put on a tranny that won't work?