My 4 year old grandson damaged a little Bachmann 0-6-0 which I managed to repair after three days of exasperation. It runs again but the smoke unit is not up to par.:cry: I took it apart again and noticed two thin wires from the headlight didn't seem to connect anywhere. Also, there is a teeny tiny black post in the center of the little square smoke unit with some more small wires attached to it from both left and right sides. Do these wires have to be "positioned" or "connected" in a certain way to heat up the liquid smoke more efficiently?