What I'am trying to figure out is which feature of ovsdb do I *need* to install for establishing a n ovsdb connection.
Taking odl-ovsdb-openstack as an example: It requires only odl-ovsdb-southbound-impl-ui as a feature from ovsdb (except netvirt bundles which I assume are not responsible for this).
After installing the odl-ovsdb-southbound-impl-ui feature I checked if something is listening to :6640 because OVS was not able to connect (via set-manager) there. And apparently nothing is indeed listeing to that port.