Thanks Ralph, I was told that the unit switched passenger cars in Chicago and often had its windows broken by valdals throwing rocks, so since those windows weren't really required they were plated over. Don't know if that's correct, but sounds reasonable. Here is a shot of some of the wiring. The motor had to be removed as it picked up power from the frame like an Athearn. I turned the motoer around 180 degrees as the solder tabs worked out better that way. I left the pcb on top but only used it for the front light. The plug is for the led in the cab roof.