How do I connect HA to a rPi running ZWave-JS-UI elsewhere on my lan?

I have 3 buildings with zwave sensors. They are too far apart to be a single zwave mesh so each building (house, garage, shop) has a rPi running ZWave-JS-UI each with an Aeotec zwave stick. Individually each rPi zwave instance is working perfectly.

What I need to understand is how to connect HAOS (Installed on a NUC) to each rPi I am assuming buy configuring zwave websocket server links. There is a LAN spanning all buildings, they can all see each other on the network.

HA docs suggest this is possible (Z-Wave - Home Assistant) but doesn’t explain how.

Anyone have this configuration working? Many thinks for your help.

HA >> settings >> devices & services >> add integration >> zwave >> PROMPT: “What do you want to add” >> zwave

enter the IP of the RasPi runing zwavejs or zwavejsui

do this for each RasPi