Usually the commander and his most trusted in the ranks would be based here. Currently, as Optimus Magnus is away on Earth, the Elite Guard HQ is under the charge of Sentinel Prime. Most of the Autobots military stratagem are discussed and planned here.
Here is the location of the autobots travelling means - squadrons of Elite Guard often leave through the space bridges to combat with Decepticons. There are five heavily guarded, separate space bridges, each kitted out with elite guard and space technicians.
This a temporary decepticon base, unknown to the Autobots below, it is here that they prepare and plan to break their glorious leader Megatron free. This territory will be deleted after the plot has finished.