If you zoom in, it mentions the house entrance location and stage it's based in.
Evil Dead is in SS24, With the entrance in front of the NYC Public Library facade. (The end of NY Street)
An American Werewolf is in SS22, With the entrance "next to music plaza courtyard stage at Twister"
Resident Evil is in SS21B, with the Entrance "music plaza Courtyard stage near Rockit"
And then Cabin in the Woods is in SS21A, with the Entrance "Between Despicable Me Minion Mayhem and the Universal Studios Store"
It's been awhile since I've paid much attention, but Im' trying to remember... Isn't there room for a path between the BMG soundstage and the Rockit station? I could very easily see them routing the line out the side entrance there and beside the Aquos theater to get to the soundstages.