I don’t have dividers in my “egg box” but they all lay in one nest. I use shavings on the floor of the indoor portion and add hay for the winter months for warmth. They make a nest and all lay in the same nest and I mess the nest up every day as I push the hay to the outside walls. Every day they make the nest over again in basically the same spot.
I’ll grab a couple pictures today when I go collect the eggs.