I think that's for people who let their buns out pretty much all the time? A home base is what I think they call it. My buns are most active in the evenings so I can see how that would work out for a lot of people.This is a setup picture they have on there
View attachment 2284758
Personally, I wouldn't use that corner litter pan since it's quite small, but maybe use that old cage bottom as one or just a hooded cat litter box.And I would probably use a food and water dish stand just so it looks nicer. And some hidey houses and more toys.