This is not ideal if the motor produces much heat. I've marked the place in the picture with black lines. There're some groves. These are the channels for the wires from pick up sheets and lights to the decoder. I changed it on the little PC board together with the resistor.
Thes reduces the current and gives a bright light.
This picture shows the cab of the NW2. For better maintanance I used a plug. The two arrows show at the two plugs. They are made of IC sockets. Also you can see the white LED which I painted black.