SM7 Service Catalog - connector

do you have any documentation or at least suggestion on how to configure catalog connector?
when I create catalog bundle with e.g. 3 items (connector "Open a Change") and I select it via Service Catalog, it creates interaction and when I approve it, it generates 3 almost identical changes with the same title and description... I would like to set Title of change to Name of catalog item, but dont understand the catalog connection configuration...