The pictures are of the AGE branch office, the small brick building. The green building in back of the AGE branch was the engine maintenance shop. That's where the A-10 engines were maintained. The other older looking building across the way was the fabrication/welding/sheet metal shops and mobility center.
The building in photo is the Aerospace Ground Equipment Branch office (AGE). The large building behind it was the Jet Engine Shop. Both were part of the 81st Equipment Maintenance Squadron in the 1980's and 90's. Back in 1960, it was then part of the 81st Maintenance Squadron where the Voodoo maintenance men did their magic.

The green hangar in the picture is Hangar 74. This hangar was used for Phase inspections, heavy maintenance and the transfer of the A-10s to Spangdahlem AB, Germany prior to closure.
The brick building on this side of the hangar housed the sheet metal and welding shops. On the other side of the hangar is a similar brick building. This building contained the Metal shop and NDI.
The corner you shot the picture from which captured the AGE Office and Hangar is called commie corner. A lot of Blokes took pictures there of A-10s and anything else that flew into Bentwaters (which was a lot of jets and props).

The hangar shown is Hangar 74, which was utilized by the 81^st Field Maintenance Squadron (FMS) on F-4D Fighter aircraft. The hanger was used for routine, scheduled phased inspections and several of the 81^st FMS shops used the hanger including aircraft hydraulics/pneudraulics, A/R, sheetmetal, tire shop, and aircraft fuel systems repair.
I was stationed at B/W from 1977-1981 in the 81^st FMS as an aircraft fuel systems mechanic. When the A-10A aircraft arrived and the number of fighter squadrons increased to five between the twin bases, our squadron became the 81^st Equipment Maintenance Squadron (EMS). Hangar 74 continued to provide maintenance support to the same functions on the A-10A’s as it did for the F-4D’s.