In the Regions page of the System section of the administrators toolbar, you will see your servers and geo-replication instances.
In this table you can see
You can also create a new instance by clicking the 'create' button to the top right of the table.
This will prompt you to fill in the Name, Location, and URLs of the PMA.core and PMA.live you wish to add.
By clicking 'Edit' (7) you will be given the same freetext fields to edit