Ron,
Yes, it most likely is the engine block heater -- there should be a single socket outlet in that same compartment near the upper rear edge that it plugs into (at least that is how my Tour Master is wired.)
You can go to the interior AC breaker panel and find the "engine heater" breaker which should control that outlet. I leave my cord plugged in and just turn off the breaker in the warm weather and during storage if in a controlled environment building.
Chuck
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2007 Tour Master T40C
Acura MDX toad
"It takes a great deal of time to recover from any improvement..."
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