The main plug in all years is a 2 wire + and - and the other plug in is for the seat belt warning light. The later seats have a male plug in so in some cases you just need to use a double female conector or just splice the wires together. With some they changed the polarity but its no big deal as it will work both ways just check the funtions before you button it up. You will need to change the seat belts to fit the correct year for your car but you can use any year SC or LX seats form 89-97 and that includes the power tracks. Just to add every MN12 has the wires for the power seats on both sides so it can be added to all of them.