Coaster brake: concave sprocket orientation

By | July 11, 2018

The sprocket for my coaster brake hub is shaped concavely in the middle, it is not symmetrical. I've seen some people on Youtube who had it mounted on the hub facing inward, and others facing outward. What is the purpose for this concave shape? What is the correct orientation? (My guess is that it makes a small chain-line tweak available.)

Video showing my hub: