How to set Z-Wave rocker switch associations to dimmer in JS UI?

I am trying to set up the direct link between a wall rocker switch (Heatit Z-Push Wall Controller, a 3-rocker switch) and the first (of 3) dimmers (Heatit Z Dimmer). The direct link should make it work even if the Z-wave networks go down.
https://media.heatit.com/2077

In Z-Wave JS UI, at the node, the group menu is where you set up the associations. What to select here, NO endpoint or Root endpoint?

Generally, that is determined by association details for the node (In your case the Dimmer kitchen ceiling) as to what they are expecting. Different devices have different options as you can see from your Heatit associations details. You need to refer to the association instructions for both devices. If not clear from the vendor docs, it won’t hurt to pick either or and test. You can easily delete the association if it doesn’t work.

Here’s a post I made about setting associations in general How to create association with zwave JS or zwave JS UI - Configuration - Home Assistant Community

Thanks! Your post helped. And as you write, to be able to save the configuration, you must manually wake up the devise to save the new settings.

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