Coupes4life

I just got done putting a Silvia front end on my 93 coupe. It was late at night and I went to put the battery in and I put it in backwards. It sparked up but i didnt blow anything. I have power to my headlights but no power to my rear lights or the cab. The only things that work are the turn signals and brakes lights, and in that cab only thing that works is the little lights in my gauge cluster. I checked all the fuses and nothing was blown. Their is a good chance I forgot to plug something in but idk what.