I'm betting yours is setup the same way my 2016 34T is, with a residential fridge.
Looking at the schematics that I have from Fleetwood your batteries are in a series/parallel configuration. Where the hot cables leave the batteries there is three connections on that post. One is the jumper from the other set of batteries. One goes into a 200 amp fuse then to the BCC. The other goes into a 300 amp fuse then to the inverter. So all four batteries are drawing to both the BCC and the inverter.
My fuses are located at the front of the batteries near the bottom.
You might go to
https://www.fleetwoodrv.com/for-owners/support/technical-assistance and fill in the info. Make sure the Fleetwood ID as well as the Ford VIN is filled out. In the comments section say that you would like schematics for electrical and plumbing and what ever else you want. It will take 24-48 hours then they will show up in your in box.