The Hub Manager menu is quite reasonably accessible from the Settings for each hub.
Sadly, the Hub Group is needlessly featured on the hubs’ details pages. It is also out of place and daft when the hubs can’t even participate in the group.
Why is there only one hub group per Location? That seems odd.
Can the creation of and/or adding to the hub group be overridden when new eligible hubs are installed or are we supposed to fix things ourselves?