Radio and interior lights not working...?

I was dicking around in the trunk with the rear pass seatbelt cuz it wasnt retracting right, removed a bunch or panels and fixed the probelm but now my radio doesnt turn on and the interior lights and red door light doesnt work. WTF? There is a black(im assuming ground wire) on the trunk floor up by the backseats just laying there, but I kn0w sure as shit I didnt disconnect it from anywhere, one end is bolted down and the other end is free. Can someone just pull up their trunk floor and see if that wire is supposed to be connected on both ends...

Thanx

I already checked the fuses, theyre good