Contact Randy at Crossroads and find out how to best fix it. I replaced the black plastic guides on the bottom of the S/O a few weeks ago and could see that the aluminum frame of the sidewall sits on top of the floor, but I could not tell how they are attached. My guess would be with recessed screws up thru the bottom of the floor and into the aluminum frame, but I'm not sure.
Texas Baptist Men-Retiree Builders member since '01
13 Silverado 3500HD D/A, 2wd CCSB srw, custom RKI bed
11 Cruiser CF32MK