The 12th Squad Captain's quarters takes up the entire top floor. It is one giant room with all the necessities Maxwell requires.
An Armchair sits in the middle of the room around it is many computer screens each displaying different information and telling a different story. Maxwell can manually control these by the panel that sits on the arm of the armchair.
Along the walls of the room are many bookshelves not to mention tables with various experiments on them. The Master Control Hub or MCH is located here and controls every detail of the Research and Development Bureau including the security system.
The Master Control Panel for the Weather Machine also is included in the display. Maxwell always give the final say on Weather Commands that affect the whole of Soul Society. The 12th Squad Captain Quarters is sealed tightly by a maximum security system, hacking attempts are thwarted and any other known means are shortly disposed of.
The entire room is controlled by Maxwell and can change violently over the course of many days.