Electrical fire under seat

[8 Ball]

I hardly ever move the seat, I am the only one that drives the car. Maybe I move the seat when I clean. I don't keep anything under the seat, there actually is no room with all the wires and motors. I didn't even have the seatbelt on when it happened because I was getting my wallet and going to pay form my parkng. I was lucky I wasn't driving. My best guess is maybe a coin fell out of my pocket and just happened to hit the right spot. The fire was just forward of the seatbelt latch. At this time I can't tell because I can hardly see down between the side of the seat and the center carpeted area. I tried looking under the seat from the front but don't see anything melted or anything. I can't move the seat because the motors are not working now. I suppose my next step is to figure out how to remove the seat and see what went on. I don't have heated seats so that is not the problem. Also there was no water present.

8 Ball