1992 Nissan Maxima compatibility of tranny

1992 Nissan Maxima 6 cyl Four Wheel Drive Automatic high miles

Ibought a usedtranny out of an 1987 maxima and was assured it was compatible, but the guy who agreed to install it states its not, because of the plugs i, e. The wirers have different ends and #of wires, the old guy I bought it from states, quite emphatically, its the same tranny, thta I just need to use my old pllugs, wiring, and is more than happy to refund my money, visibly ican see no difference, please help me asap, my soon has many medical issusses and appointments!Thankyou jeff turlock, ca.