You are correct. Linear takes the approach of setting up additional switches that can control primary one via z-wave. The additional switches do not use the traveler wires. All they need is power (Hot lead, common, ground…no load needed). All the travel wires you have, you can cap off (put a cap on it, electrical tape on to keep it in place, shove into back of box and forget about it).
You will need a master/primary switch a WT500Z (dimmer) or WS15Z (on/off). Your case, the dimmer. Once installed, then you can install as many WT00Z (accessory) switches to expand into a 3+ way setup.
The accessory switch itself never connects to a light, all it needs is power then for you to associate it with the primary switch. Once associated, is reacts to your on/off/dim commands pretty fast. The lag time in response is minor, so much so that if you didn’t know the switch wasn’t directly connected to the light you would never notice.
- Install your WD500Z. Make sure it worked turning on/off/dimming. Now add it to your ST hub (Add new device).
- Install a WT00Z accessory swich. Add it to your ST hub.
- Use the minimote remote to link the switches together. You need the remote because it initiates a ZWave command that is not implemented in the ST hub. BUT…once you have the remote, you will love it (great for setting up “good night” command and turning lights off, then putting next to bed). See following post for instructions on using remote: Evolve LTM-5 transmitter to LRM-AS association
For assistance/tip on wiring, see if following might help: Need help with installation of Evolve LRM-AS and LTM-5. I am not an electrician, but after 30+ switches, multiple 3 and 4 ways, I can at least proudly say I know enough to have not been electricuted (slight shock before realizing two different breakers are going into a box with 3 switches, so turning off one breaker did not totally kill power in the box…but never “hair on end” “eyes glowing” electricuted).