Have a quick look everywhere for bolts. The one that caught me by surprise was in the center of the main floor. It was concealed under some tile that had been put down on the floor. I did not expect to find one here.
In my closet there was a piece of wood on the floor of the closet. Because of rust and weathering, it wasn't obvious what and where the bolts were. In my Boler
closet, there were two bolts holding the fiberglass to the frame.
The location of the screws may vary a little. Just follow your way around all of the frame from the inside of the trailer. I found that once I got all the bolts out, the fiberglass came free from the frame very easily.