2009 Chrysler Aspen Removing the 3rd row seats

Hi, I'm trying to remove the 3rd row seats on my Aspen. In order to do that I have to unbolt the seat frame from the body. Some bolts that would remove only the seats leaving the frame in are inaccessible. I broke the first bolt goimg into the body and don't want to continue (there are 4 or so bolts) in case there are nuts behind the bolts. Do you know if that is the case. If it's just a matter of the bolts in very tight then I will remove them. But if there are nuts involved then I think they're hidden by the gas tank.
Thanks in advance.