Hi my name is Carl and I am a trainaholic and have been model railroad involved since I was 6 years old. I know where to solder a grey / orange motor wires when the motor is still in the cage and loco. However, I have pulled one out of my parts box and need to wire it for a decoder. I think I have read somewhere that the bottom of a motor will be painted white, that may be a pipe dream(?). So my question is how to tell which side is up and which side is down. I can put a battery to turn the shaft but I have no clue which direction a KATO motor should turn to go forward. Any help is appreciated, please. BTW this is in a KATO SD-90/43, also there is no paint of any color on this motor.