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.