Here is a view from the fireman's side in GG1 4934. I have one from the engineers side but the glass was to cloudy, to see the limited view. You can see is isn't much at all. What you can't see is the high hood that completely blocks vision to the right.
In a push move side window view only, you may as well be standing in a dark closet especially at night. 0% view. pray your radio is working and keep pushing.
This one is the camera through the glass window. This was as good, as it got next to sticking your head out the window. If there the fireman would give the clear Green signal to the engineer on the other side a few seconds faster than the engineer could see it rounding the curve.
The high hood diesels see less than this. but the 44 &45 tonners with the high center cabs have great vision.