The battery disconnect has nothing to do with the generator. It only disconnects the battery from the converter and other 12VDC items. Also, there should be a resettable fuse between the battery and the breaker/fuse panel in your trailer.
This link will help you understand many of the items in your RV. New to RV's helpful hints
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989, seasonal since 2000
Car Shredder Op/Tech, Scrap Metal Recycling - retired
The Faster I Go, The Behinder I Get.