Just thought I'd follow up on this one. The retractable cleat hardware ended up unharmed. It is just the screws and washers that came off on the reverse side. No big surprise here, as most of the fit and finish hardware in my '07 H200 has come loose as well (seats, dash, etc). Finding a nut or washer rolling around after a day at the lake is a very common thing with a FW boat apparently.
Unfortunately the cleat screws are nearly impossible to reach because of the way FW decided to mold the fiberglass. I tried using a camera mounted inside the engine compartment connected to a laptop (so I could see) and then some really long extensions to put the screws back on but failed after 2 hours of trying...
I think to get this done I'm going to have to take out the entire back bench seat so I can lay flat on my back to allow an arm to get in through the fiberglass cut out (not sure how easy this is to remove)
A warning to others, if you suspect your cleat backing screws could be loose, try to tighten asap. Or you will end up like me fooling with using magnets, glue, tape, etc to hold a screw to the end of a 2 ft long tool to try to get it back on.