Galera MariaDB cluster is missing "bind-address" system variable? (UPDATE: No, that system var is not available until 10.3.3 )

I have been trying to reinstall ClusterControl(CC) (Severalnines) and discovered that when CC is asked to re-import the clusterinformation, it will try to find the "bind-.address" from the nodes. It fails, because bind-address is not found.

I can verify, loggging on to any of the Ubuntu servers, and "show global variables like '%bind% will return nothing?

I have tried entering wrong info deliberately into the .cnf file, and when doing so, mariadb refuse to start. When setting bind-address=[correct IP address], mariadb starts up fine and joins cluster. But it will not show any variables called bind-address/bind_address.
It does show the wsrep_node_address, though. are those two by any chance "mutually exclusive", with wsrep replacing the bind-address?

I hope someone can suggest where I can check to see what I might have done wrong...