The CNW bi-levels operated in push-pull operation, I wanted to add a headlight 
to the cab car but didn't have an easy way to get power to it since the only 
power contact is in the locomotive and the split level baseplates do not have 
room to add an extra motor under them.

So I strung a train line through all of the cars. Ex 1 shows it connected, 
ex 2 shows it unplugged and ex 3 shows it hooked back into the door. Finally, 
ex 0 shows the rear headlight on.