I just picked up my new 2016 Denali 335RLK 5th wheel yesterday. There is a knob/pin mounted on the driver side of the trailer near the service bay. I have no idea what it is for and the dealer just scratched his head. There is another one of this little knob/doo-hickie thing-a-ma- jigs in the basement also.
I am puzzled. Could not find anything in the generic owners manual.
Picture did not transmit.. Will keep trying.
2016 Denali 335 RLK 5th Wheel
2016 Chevrolet Silverado 3500 4X4
Without the picture hard to say, BUT, I have a small plastic piece mounted on the side of my 319RLS and it is for a hook that will supposedly support the water hose. There was another in the storage bay, but I removed it and since when I picked up the trailer, the one on the outside was broke, I have never used the hook.