I have a few questions. First off, my car has power nothing. I have crank windows, manual door locks, manual hatch, no fog lights or rear defogger. While looking in my dash, I took off the panel where, in the 92 firebird atleast, the foglights / defogger / hatch release is. Now mine had a blank panel, but behind it there were 3 plugs, all with wires going to *** knows where. I want to hook up a rear defogger and foglights, but where do I need to connect to in order to use the plugs that are in my car?

 

Those are the connectors for various component options that were available to the firebirds. All you need to do is add the components (defogger, etc.) and the switches.