Thank you for the message, Yes these pads are auto on with the build in thermostat, but I still want add the on/off switch onto the pads, since you don't want the pads heat up the empty tank when the temp below 40F. also, the pads and thermostat will using a bit of power from battery, so, I like to add the on/off switch to them, only turn them on during the cold weather.
I really like to use the Thor factory preserved Tank heater opening on the control panel, and fuse pre wired on the power control box, but no diagram to be found, also, look like the tank heater prewired to a relay???
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