I have a 2015 Reflection 29RS with a Atwood Model GC6AA-10E hot water heater. Has always worked on both Gas or Electric. Had the furnace worked on over the winter and now the electric side will not work. Gas works fine. Unsure if related to furnace repair just a coincident. I looked at the back of the hot water heater and noticed an electric cord not plugged into anything. See photos. I asked the repair center and they said they would have no reason to unplug it, but I don't have confidence in what they do (my furnace still does not work). So my question is, should this cord be plugged in? I noticed there is an outlet in the bay area with nothing plugged into it.