By default, the Masterone ships with a master-to-group cable, allowing you to link a group to it. The master-to-group cable has three IDC connectors: one for the master, one for the group, and one for extending the connection to other groups.
To connect more than one group, you need the group-to-group extension. This cable has two IDC sockets and one IDC plug. Connect the plug to the third MG socket, and you’ll be able to link two more groups to a master. The group-to-group sockets are spaced to accepts group configurations of roughly 72 HP, allowing up to 4 QSCs.
It is possible to chain more GG extensions to one another, such as to add a fourth group or connect groups with larger channel configurations (up to eight QSCs).