Something else to keep in mind is that if you turn off the house batteries at the switch ( by the stairs) the generator will not start either. Everyone else is correct the alternator charges all the batteries and the MOM start switch will let you start the generator too.
Winnebago has been wiring their coaches this way for some time.
You might want to go on this site to the wiring diagrams and put in your coach and get the wiring diagram for everything.
Good Luck
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2014 Winnebago Adventurer 35P,Ford F-53, V-10
2011 Ford Escape,2000 Roadmaster Tow Dolly
"Have a Great Day, Enjoy RVing."