Can someone tell me how to wire an 022 to the cw-80 transformer. The information I have found tells me to wire both the black and red of constant voltage to 022. The 022 has only the one post for external power.I wire the varible side to the track then can I run just one wire to the 022 plug?Will the 022 then ground through the side rail or do I need to somehow wire 2 wires from cw-80 to the 022? Thank You, Mike