@ExtendedObjectClassDefinition(category = "documents-and-media",
							   scope = ExtendedObjectClassDefinition.Scope.GROUP)

I has created a custom configuration interface with scope GROUP (like above).

I can view and change the configuration values on the Control Panel > System Settings > Documents and Media UI but they are the system values.

I need to set the values for a specific group (site): to do that I created a FormNavigatorEntry that adds a fragment to Site settings form but when I submit the form the custom configuration values are not stored.

What is the best way to do this use case? What are the componets I must implement?

Thanks