That spur track is track #12 which in 1916 was shown as 332' of 3 rail. In other company documents it is described as: 3 rail spur-Stoddard Lbr. Co. "Rip Track". Per AFE 368 dated 1932, the track was removed from SVRy accounts and leased to Stoddard Lbr. Co. As Stoddard had a large number of their own flat cars I'll jump to the conclusion that this shop belonged to Stoddard Lbr. for repair of their equipment. Sorry no help with a photo.
The SVRy's car car shop sat in the same location as the large red building in South Baker that is there today. That building was built to house SVRy engines 250 and 251 which were too big for the turntable and old round house. When the old car shop building was demolished a "coach shed" bay was added to the machine shop. The machine shop was located South of the remaining large red building that was the last engine house.