Thinking about adding a battery to my 2025 van

I did the thing and bought a van instead of building. I wanted one where I wouldn't have to start off with maintenance and I didn't want to put my faith in a random person's build skills. I'm hoping it isn't too hard to use Mercedes and Camper World for warranty and maintenance, but I know there's pros and cons.

Anyways, I got a 2025 Revel for the used price of a van several years older. However, it doesn't have both lithionics batteries like I wanted, just the standard one. I know I can add another, but also that there are changes that have to be made to fit it in its place and that there's a smaller cubby that would fit in front of it than what is there now. Looking for the part online, I think the battery costs several thousand dollars, but can't find the smaller cubby. I'm also thinking that having Camping World add it for me would take the price up a lot, similar to the $15k they charge from the factory for the upgrade. I've read the batteries are pretty much plug and play and that people can add them themselves. I haven't seen anyone do it yet in the 2025.

Do you think it's possible to get the parts including the smaller cubby and do the work myself? If not, where would be the best place to take it?