Problem with second switch on AEON Labs ZW116

Hi all,

I’m relatively new to HomeAssistant, but anyway this might be more a general z-wave issue (I’m not sure).

Here’s what I’m trying to do - I have a light connected to AEON labs nano dimmer in a stairwell, and I have a ZW116 connected to switches at the top and bottom of the stairs.

So obviously what I want to do is to use these switches to toggle the light off and on, if either the switch at the bottom or top are pressed (they’re normal switches BTW, not momentary).

I started off with Z-wave JS and then realised I probably needed to move to Z-Wave JS UI in order to set associations.

But my first problem is I’m actually not sure if the second switch is being detected. I checked it with a meter and it seems to be live/not-live as you might expect, but I don’t see an entity representing the second switch (S2) in HomeAssistant … i.e. under ‘Controls’ I only see one switch.

And I try to toggle both switches, I think I only see one in the logs:

Subscribed to Z-Wave JS Log Messages…
2023-04-22T07:06:23.168Z CNTRLR   [Node 005] Hail received from node, refreshing actuator and sensor values...
2023-04-22T07:06:23.177Z CNTRLR » [Node 005] querying Binary Switch state...
2023-04-22T07:06:23.262Z CNTRLR « [Node 005] received Binary Switch state:
                                  current value:      true
2023-04-22T07:06:23.266Z CNTRLR » [Node 005] querying meter value (type = Electric, scale = kWh)...
2023-04-22T07:06:23.343Z CNTRLR » [Node 005] querying meter value (type = Electric, scale = W)...
2023-04-22T07:06:23.428Z CNTRLR » [Node 005] querying meter value (type = Electric, scale = V)...
2023-04-22T07:06:23.518Z CNTRLR » [Node 005] querying meter value (type = Electric, scale = A)...

Is there some configuration I should check?
Currently I have:

80: Basic CC report
120: Switch
121: Switch
122 Control Destination (S1): Association Group 3
123 Control Destination (S2): Association Group 4
247 Switch Mode (S1): State Sync: On/Off Switch
247 (!yes it's repeated!) Switch Mode (S2): State Sync: On/Off Switch

Any help gratefully received!