Here are some ideas from DarkBeer's photo from the meeting.
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If the green is a shrouded stairs, then maybe the red is the elevators. Yellow could be the tram route going through the big opening between the escalators and the structure. Purple could be a ramp from the overpass on the Hotel side. It's not clear if there are stairs or elevator on that side.
But if that is the tram route, it puts the elevators and stairs on the outside of the plaza security screening, in addition to any ground-floor guest parking. We seem to have a lot of unanswered questions. But thanks to DarkBeer for the pics.
EDIT: Alternatively, there is just as plausible an argument that the tram loading area is inside the structure.