If that still isn’t clear, try this: Imagine you are standing near where the clock tower is today; you are facing the library’s main entrance. The wing of the library on your right is where the temporary army huts are located in this image.
Update: January 28, 2017
During time spent at UBC in the late 1980s, I recall a faculty member referring new students to “the bus stop coffee shop” not far from the Main Library (roughly where the campus White Spot is located today, inside the David Lam Management Research Centre) as being the source for the best cinnamon buns at the university. And I recall wondering why the coffee shop was so named. There were certainly no buses anywhere near that location. (In the 1980s and until relatively recently, the central bus loop was located adjacent to where the Student Union Building is).
It wasn’t until stumbling across the image above that this low-grade mystery was solved for me. The structure in the middle of the Leonard Frank photo is the central bus stop in 1930. And, yes, the bus stop appears roughly to be at the same location as the Bus Stop Cafe of the 1950s-1990.