Possibly, and an extended arm rest, that could be what those brackets are, maybe? Well, just looked at some old pics, never had an all weather cab on the fireman's side. It did spend most of it's life on Lines West though, between Seattle and the Bellingham Sub, so nice to see a local switcher saved! Looked like it was used by the Navy for awhile after the Milw, maybe those are RC light brackets? Then it went to the Army! The Navy pic doesn't have those weird windows, but the Army installed them!
Mounts for setting the tray on at the drive-in restaurant. The waitresses will need stilts instead of roller skates...