This is by no means definite, but just wanted to post up a WIP to better illustrate my previous post
You can also see the corridor from the 1st ladder leading to the back ladder going to the EMM.
Just out of curiosity, those power transfer conduits(?) at the back are supposed to be equal length/height, aren't they? They were depicted that way as a "forced perspective to give the illusion of more depth. I really don't think they are actually supposed to look like that.