Warehouse
A Warehouse. In Spaaace. Those TAC-1's give an idea of the scale of that cargo bay. Freighters will dock in the main bay, as well as with various points on the hull.
The shuttlebay inside it is one of two fighterbays. The smaller one is on the back side of the station. Still plenty of detail to add to the hull, going for a look inspired by the new arcadia, with lots of subunits sort of tacked on in gaps in the main superstructure.