Charging TM batteries with jumper cables

[T and C]

Folks,

I have the usual problem that so many threads discuss: Running the referigerator on DC power while towing runs the TM batteries down. The suggested fixes that I have read about are well beyond my knowledge of electrical repair.

I currently have neither a generator nor solar panels. I have read on these boards that it would take 2-3 hours to charge the batteries by running the TV motor while parked.

What if you just connect the TV battery directly to the TM batteries with jumper cables and then run the motor?

Tom