Is it supported for a endpoint to use more than one custom repositories (imported) at the same time

there are 4 existing local repositories is use for OLE 6 endpoints. I can import the repositories and that were found on the endpoint. But when I register a new repository to the endpoint, it will only let me select one at a time. However it seems that it will only register one at a time and not use all 4.

Is it possible to register more than one repository to a endpoint?