Oh no! Not another TMCC ?

[strogey]

Yes, I am afraid so! Sorry. I am attempting to wire a couple of Fastrack Switches to a SC-! Accessory/switch controller. I understand the part about the common and the"Thru" and "out" wires but there is an additional wire (Yellow) which I assume is the gnd for the LED on the light. Does this also get wired to the common? If not where do I connect it?

Thanks all. Sure there will be more as time goes on.