Associations Between Wall Switches - Please Help?

I’m using z-wave to solve a simple problem in my house - There’s a single pole switch on the far side of the room that I’d like to use a dead switch at the door to control without wiring.

I bought two Linear switches, the WT00Z (slave) and the WD500Z model (master) and figured I’m good to go. Load up the interface, tell Smartthings that the WT00Z can send commands to the WD500Z and we’re good to go.

But that doesn’t seem possible without something called associations?

And even worse…I can’t do associations using my ST app or the IDE or web interface? I need to buy something called an Aeon minimote to connect these two devices together in an association?

Tell me I’m wrong – There has to be an easier way???