Thanks to Robbbyr for the confirmation and additional information. I want to share how I did the conversion, as reference info for anyone else who might be interested. Here’s how it ended up:
I went ahead and extended the top-right and bottom-left battery terminal posts so I could co-locate all of the loads and all of the grounds. I covered them with anti-corrosion grease after the photos. IMO, the bank is much simpler in this configuration. There are two less cables than the stock configuration and it’s easier to get to the fill ports.
If my math is correct, we went from 384 Ah (4 * 96) to 450 Ah (2 * 225) in the swap and ended up with a better “true” deep cycle battery. It was time to swap the batteries regardless, and the cost/benefit seemed worth it to me. Paid $503.96 for the set at a local farm and ranch store. Hopefully it pans out.
We’ll be putting the new bank to the test next weekend while dry camping for four nights. Can’t wait!