I try to build the models as best I can. Every once in awhile I ask, what's that for? I'm cutting the pilot faces for my SD80MAC. Up near the top of each step is a oval hole cut clear thru the pilot face. I can't tell why it's there?
It's right next to each ditch light near the edge of the pilot face below the top step cutout.
This photo is from the CRHS Conrail photo archive.
Is it something to do with handling the cut lever?