I opened the original posted pic in Photoshop. Made some adjustment (magic), Enlarged it for detail. And noticed several more things.
The engine on track 2, has no side rods. All the engines are not in the round house, but out in front of it, The wall that is standing is the front wall. Probably the only non wood wall in the place. The engine on the turntable has some unusual trucks on the tender, some kind that I have never seen before. Also it has running boards the entire length of the engine, even along the cab. With the rear driver setting that far back, and what appears to be a notched cab to fit over the driver, there may have not been a front door, that we are so used to. So the running board allowed for access from the cab with getting to the ground.
After adjusting the image. A couple of observations. It appears to me that almost all the people in the pic are Black, and appear to be fairly young. Which would make sense to me, as all the young men in the South by that time of the war, were in the Army, and not lounging around. My guess is that they were there cause that was where they worked before and during the war, and literally had no place to go. I guess they were hoping to get their jobs back before to long.
The two engines setting in the rear without steps or cowcatchers, Appears to be to be older style engines, as the cylinders set quite high up on the smoke box, and the main rods are angled downwards.
There appears to be three sets of tracks running in the background, and at least two more boxcars in the rear of the yard, and maybe a couple more in the background along the tracks.
Also what you think is a wire, I believe is a crack in the glass Negative.
The letters on the side of the tender are “A&WPTRR”.
Joe, Where did the original come from, and is there possibly a larger file size to work from?