Based upon the aerial photo's I found, I think it might be quite different than I previously thought. I just made a new sketch to explore the idea. I also superimposed the aerial photo and extended it a bit. I would love to hear your thoughts about it!
The angle of the aerial can be a bit deceiving in perspective from the satellite image of Google. It might also be possible that the entry was pulled a bit backwards later on due to restructuring the area. The (spruce?) trees were planted next to graves as you can see in the photographs, they were still very small. But 60+ years later the would be the size as they now are. Meaning that most of the graves would lie far behind the tree-line.