Here's a photograph from the Niemann album alongside W. Rutherford's 2005 map of Sobibor (c. 1943). By my estimation, the photograph looks north east from a location roughly equivalent to the red square next to the number 11 on the map, which I assume is the location of a guard tower. The angle and elevation of the photograph suggests it was taken from the tower. We see the extreme south east corner of the camp, an area which, on Rutherford's map, corresponds to buildings 12, 13, and 5 through 9.
In the foreground is a guard hut: another is visible to the right of the gate on the right of the photo. The shack like structure in the left middle distance is labeled as a "storage hut" by Rutherford, and if that ID is right, then we see the extreme right hand gable end and wall of the SS accommodations at far left. The buildings in the distance are, right to left, speculatively identified as the Ukrainian jail, SS canteen and kitchen (perhaps two buildings rather than the L-shaped structure on Rutherford's map), perhaps the SS garage and, the commandant's house, the Schwalbennest.
