Getting some Gadgets at the Grunt Armory (4)

I followed my senior grunt, No. 147, toward what seemed to be a mezzanine structure near the entrance of the armory. It was a tall and massive walled structure attached to the armory wall, separating the actual warehouse from what I assumed was their "office," where administrative work was conducted. Hence, the name she mentioned before, "administrative station."

It had an equally large and tall staircase leading to the office itself. But... as we got closer, I noticed another walled structure before the staircase...

It was fairly small in comparison to the mezzanine office structure near it, but... it was still noticeable to me, especially with a plaque above the entrance that spelled "Entrance A Security and Intercom."