1994 Fleetwood Jamboree Rallye

I'm trying to figure out what these are for, any ideas?

(Yellow dots)

The 3 circuit breakers on the left?

That big relay in the middle?

Those 2 small plugin relays on the right side?

That 10 amp fuses?

And that other big relay behind the grill circled?

I think I'll get a toner and disconnect each, then start hunting. I'm thinking one of the big relays connects the coach battery to the engine battery for aux start. As for rest, I don't have a clue.

Would anyone hazard to guess what the rest of those are for? A schematic would be awesome! I have the owner's manual, but it doesn't get that far into it. Is there a service manual for the coach/chassis? 

Thanks in advance, Phil.

Added since above...

I may have figured out why some of them are there...

Killed the coach battery in the middle of the night. Woke up COLD, started chassis to warm up the rv, lights came on, furnace kicked on...

I discovered that my chassis is designed for the alternator to charge the coach/gen battery. I've read about that but never checked it out. 

BTW, that chassis heater can warm the whole camper fast!