Good point. For TPC's the 6-12194 is NOT needed when fed by traditional transformers, like your Z, It's only for PowerHouses, 135 and 180. For these traditional transformers two connections will be made, so two independent wires will be needed. Each of these wires connect to a binding post on the transformer; the other end of them to a screw terminal on the TPC.
If you're using a LEGACY Powermaster instead of a TPC the 6-12194 may still apply. Unfortunately there are no user's manuals for these to be found online, so I can't tell if they have binding posts like a transformer, or screw terminals like the TPC, or Molex-style connectors like a Powerhouse (and as found on the 6-12194).
If they do use connectors then you'll use one of the harnesses seen on either end in this picture of 6-12194, instead of the middle harness, to go between the transformer and the LEGACY Powermaster.
Mike
