When you setup a production server that is a member of a license cluster, the setup program and licensing import will create registry entries for each of the other servers in the cluster.
To complete the setup, you need to use the Administrator's Console to set the address of each of these co-clustered servers. When in a clustered setup, two new nodes are added to the settings treeview-- "ClusterServers" and "ClusterServer".
The ClusterServers node has a child node for each co-server--working with this is covered in the section Setting Cluster Server Addresses
ClusterServer is covered in the section, Setting Server Polling Options.