I got a 91 and what I did was, first take off all the trim on the drivers side (on the bottom) and the same to the passengers, then i pulled out the kick panels, and then pulled the carpet and tucked it on the side of the seat so it'd be out of my way, popped the hood, looked for open places in the firewall through the hole, then just looked for places where I could drill through, it's pretty easy I thought, just make sure they are places where you can drill through without a chance of hitting any part of the engine.....I drilled several different size holes on the drivers and passengers side so I can add stuff as I get it.....oh well goodluck!