Sounds like the Bird in my Axis 25.2 is wired correctly because my chassis/engine starting battery was weak right, hooked up trusty craftsman 2/10/ start 12volt charger and left it on 2 volt charge overnight, woke up to the smell of battery acid in the coach, looked at the charger it was pegged wide open and the top of the battery had dried acid water on it. It's the Original motor craft factory battery and it still read 8 volts ! ?
It's 3 yrs old, I replaced it.
Thanks for all your questions and answers, we should open up a RV dealership lol
Regards Bill Barber