[SOLVED] Add new Zwave device: Heatit Z-Push Button 8

I am all new to openHAB and have just started to add my first Z-wave devices to the system. I successfully managed to add a TZ67 Wall Plug Dimmer, but the Heatit Z-Push 8 button was not successfully added. It appears in Paper UI as “Unknown Device”. I understand that the database needs to be updated, but am not sure how to do that.

As far as I can see the Heatit Z-Push 8 button is similar to the Sunricher ZV9001K8-DIM, but the Command Class does not (so maybe not that similar after all?)

Is there a guide on how to do this? (I searched but didn’t see any guides)