There are three connection terminals on a SPDT center off momentary (on)-off-(on) switch - here are the connections on the bottom of a FasTrack Remote switch:
"GND" connects to the center common terminal
"THRU" & "OUT" connect to the other two respectively.
The "RSC LIGHTS" connection on the bottom of the switch is left unconnected.
For direction indication, the RSC line can be used in connection with the controller circuit diagram posted earlier if you want to make your own, but then you are back up to the bulk(and then some) of the original cheesy controller.