AH! So Vic, you are suggesting if I connect the white and black wires in the pentagon shape (7-pin connection) to the distribution panel in trailer I will gain the advantage of my tow vehicle's alternator charging up my trailer battery while we are driving?
And that would be a good thing? No undesireable consequences from this...like overcharging the trailer battery? Once parked the 7-pin would be disconnected from tow vehicle, so no chance there of drawing off tow vehicle current.
Exactly. I do not think that overcharging the trailer battery
is an issue, unless your tow vehicle overcharges its own battery.
We always started each trip with a fully charged battrery at home, not relying on charging it as we drove.
I think the key issues are using the proper wire gauge, precise connection instructions, and the capacity of your tow vehicle's alternator.