2006 Flagstaff 625D battery wiring question

[TandTManson]

Hi,

We have a new-to-us 2006 Flagstaff 625D, and the wiring to the battery doesn't make sense to me. I've contacted Forest River, and wiring diagrams are not available.

There are black and white wires going to the negative terminal, and red, black and blue to the positive, which seems off to me.

I've attached a pic - any insight onto whether this is correct, or what the various colors indicate?

Thanks!