Here's a photo by Dennis Smolinski on Flickr looks like it's taken looking south (timetable east) from Milwaukee Jct tower toward the station platform. The depot housed the GTW operator who copied train orders for GTW trains -- office call "DM." The tower was manned by NYC (later PC/Conrail) people and controlled the crossing of the GTW Holly Sub with the NYC and GTW Mt Clemens Sub. There were wyes in 3 directions. The GTW roundhouse was also located at Milwuakee Jct. I had the opportunity a couple of times back around 1965 to ride the engine of a commuter trains from Pontiac to Detroit and back. I had trouble sizing this photo, but am also posting the Flickr link for much better resolution.
https://flic.kr/p/nu1dJj