Sorry for the confusion, my 2013 24ft Chateau has the electrical power cord coming out thru the bottom inside a lockdown access panel on the drivers side. There is a cap you un-screw and the power cord is passed down and under. The threaded cap is what is missing. Someone here already explains that what I'm am searching for is known as a (Threaded Inspection access hatch) mostly used on boats. I want to thank all of you who responded.
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