I converted a WaterCop Classic to additionally accept, along with the WCC's original transmitters, Z-wave leak detectors (Intellitech). I talked about it here.
Before I converted, I bought a pretty cheap z-wave WaterCop valve that the Ebay guy said was newer version, but who knows. I just went down to the basement and took some pictures. No Aux input jack like my Classic has.
Where do those three wires go? Maybe to the motor on the valve? It says: power, close and open. What's that terminal on the right?