Certainly.
1.) First the 6-12194. This is used to connect your power source to the TPC. 6-12194 comes with all four items pictured. You'll only need the middle harness. You'll use both connectors (and two 135 W max power sources) if you have a TPC 400, or only one of them (and one 135 W max power source) if you have the TPC 300 (6-14189). Another option for the TPC 400 is to use only one connector with a 180 W max power source.
The wire ends are connected to the appropriate screw terminals on the TPC (see, (2) below).
2.) This diagram is from the user's manual for the TPC 300 (71-4189-250, 4/04):
You can see that the 6-14192 cable is used in addition to the 6-12194. Be careful. You'll notice that the Lionel part numbers for the two cables are remarkably similar.
By the way, if you use a LEGACY Powermaster (180, which is No. 6-37146, or 360, which is No. 6-82883) instead of a TPC you won't need the 6-14192 Serial Cable because the serial TMCC data is received by the LEGACY Powermaster via radio instead of through wires. The LEGACY Powermaster 180 is a more modern version of the TPC 300, and the LEGACY Powermaster 360 is a more modern version of the TPC 400.
(Thanks to @CAPPilot for the first photo above, from https://ogrforum.ogaugerr.com/...0#152618248462599970.)
Mike
