Since it is an after market part, It can be installed in many places.. HOWEVER since the simple 3-wire hook up is Main battery Positive, Aux Battery Positive and Ground. And there is one place in your motor home where all 3 can be found, Usually within an area smaller than the palm of you hand.
Look for the isolator solenoid. or other isolator device (This is the device that lets the alternator charge the house batteries)
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Home is where I park it!
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