Connect constraint enables to connect existing contraints to a selected relation OR existing relations to a selected constraint
The option is only enabled when:
or
When selecting the menu option after selecting a relation, a dialog will open enabling you to select one or more not yet connected constraints to connect to the relation
When you select a contraint a description is provided on the right side.
When selecting the menu option after selecting a constraint, a dialog will open enabling you to select one or more not yet connected relations to connect to the constraint
When you select a relation a description is provided on the right side.
As mentioned before, always try to connect existing constraints before creating a new one...
Quaestor Interface | Constraint>