Pretty much. Although you enter through the east side of the building, and pass through one of the libraries, also located in the east 2-story section (look at it on Bing). You leave the library and travel west (northwest) through the little hallway into the Boiler Room, which is the back part of the building.
On Bing you can also see the motor penthouse for the 4 show shafts, which sticks up about 20' past the short part of the building in the back. Your first elevator climbs in that shaft, then travels forward through the shorter building and into the drop shaft.
Then of course your vehicle lands, backs out of the shaft, and rotates toward the center of the building. You exit, turn and head toward the photo station, through the gift shop, and back out the east side of the building, a floor below where you entered.