A close up of the photo below. Facing south-west. Leonard Thygesen has informed me that this was know as the "Past Records" building in it's later years.
Here's a view of factory #17 showing the service entrance, viewed from the north west corner. The stack of wooden bucks against the north wall were used for securing new cars for shipment on rail cars. Photos from the Buick Research Gallery in Flint, Michigan.