About the time I finished installing the Surge Suppressor, the mailman showed up with another item I was waiting on-
A thermostat to control the Dayton 5ZK52 wall heater that was installed in the bed base.

Here's a pic of the heater installed-

The 1,500 watt/ 5120 BTU Dayton heater is powered by 120 volts when the generator is running or when the RV is plugged into an outlet. While it does have a basic thermostat, it's really inaccurate and impossible to set without any doubt.
So I bought a Aube Technologies TH401 Compact Non-Programmable Thermostat form Amazon. It's a basic digital thermostat that I can mount anywhere. My plan is to mount the thermostat on the wall above the rear bed so that it can easily be adjusted while in bed.

First I hooked it up to the 5ZK52 to test it out (after I disconnected the factory thermostat)- it worked just fine-

After that I removed the bed base top in order to run the electrical cable to the thermostat-

I ran the romex cable (12-2) from the heater box to the area below the thermostat location. The cable secured to the box-

The wall that I'm mounting the thermostat to is hollow, and because it will be carrying 110 volts, the connections need to be made in a standard electrical box. I used an "old work box" -

I cut the mounting hole in the thin luan wood wall with a utility knife and pulled the romex up through the hole-

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Then I pulled the romex into the box, mounted the box in the opening and connected the thermostat wires to the cable using wire nuts. The electrical tape is just my technique-

Then I mounted the thermostat base to the box-

And installed the cover-

Then I reinstalled the top of the bed base and the heater itself. Here's a pic with the mattress installed. I like the location-

While the cover was off I bought a steel plug at Ace hardware to fill in the hole where the old thermostat control used to go. Then I painted it with some brown spray paint-

All I have to do now is install the cover when the paint is dry.
One great feature about this thermostat is that I can set it to maintain a minimum of 41F in order to keep the coach warm on those cold nights in the driveway..... :D