I have a constant duty solenoid and 150A breaker under the truck hood going to a 2ga run to the receiver with an Anderson connector. My trailer batteries also have have 150A breaker to a short 2ga run and Anderson connector on the tongue so I get better vehicle charging.
My setup is slightly different because I also run 2-way power to my truck camper and have two banks of batteries in my truck in addition to the bank in the trailer.
As was already posted, it does not fully recharge my battery bank but it will bring it up before shore power or solar top them off with an intelligent charger.