Hello, does anyone happen to have any prints relating to and around a 1950-1958ish O'Keefe frieght? Simple enough unit, but have no idea what nomenclature might be or how things were "originally" wired. We noticed the lock circuit directly feeds the ML contactor coil. Looking for safety string...but all wired are all jammed in and same color. Tried ringing out but have a feeling locks, safety string, calls all using ae commons. Any help on some prints would be greatly appreciated!