There were two tracks in there, one a very short double-ended siding off the WB Main and another stub next to 37 that may or may not have been tied into 37 at the west end at one time. They lasted into diesel era. IDK their use - educated guess probably for milk/express cars or Pullman add/drops as they seem to have disappeared a few years after passenger trains and milk cars. I have one aerial steam era pic that has two single cars there, one at the west end of each track, and they are too short to be passenger cars but too long to be 40' freight cars so probably either milk or express cars.