Suggest, if you haven’t already done so, you register with Thor so that you can get your wiring diagrams.
That will show you where the head unit is wired into the house batteries.
But it sounds like you might want to wire to the chassis battery as well.
This would mean a 3-way switch on dash (house battery vs chassis battery vs completely off).
That way you can decide how and when to power it.
A fairly straight forward mod.
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'17 Vegas 24.1
Fallbrook, CA
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