The configuration follows the same configuration system that is common to all dCache components. In keeping with other dCache components, the default values are exposed and well documented.
In general, a site should review the star.properties file (in the standard location for configuration defaults) and update their site-specific configuration, if necessary.
Map local groupid to experiment VO names as appropriate
star.gid-mapping = 12345=/atlas,12346=/cms,12347=/lhcb (EXAMPLE)
Running the dcache-star command will generate records according to that site's configuration.
Edit SSM's sender.cfg to have "path:/var/spool/dcache/star" so that it can find and publish the records dcache generated.