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That should get you all you would want to know about the Battery Control Center except for the wiring diagrams.
I'll try to make a list of the internet addresses for the other information.
I can send you a copy of the Forest River Owners Manual but it is quite generic.
The Cummins Operation and Maintenance manual is about 300 pages thick. But, lots of good information. If you do any of your own diesel maintenance, it is worth having.
The Allison Transmission Operator's manual is 60 pages.
The Spartan manual is 30 pages and very interesting.
I have manuals for nearly every system on the RV. If you are in need of them let me know which ones and I will get you a copy.