Administer a Director Instance
Go to Administration in the Top Menu > Directors

Hit Add a director to map another Director instance. Enter a display Name, the Address (either IP or DNS name) for the Director instance, Username (which in most cases should be the default admin), and Password, then hit Save. rWeb will attempt to connect to that Director, and if it reports a Status of "connected" you can click the hyperlink on the Name to configure the Director instance further.
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The Password should be the SSH password of the admin user for the Director instance, not the password used for the Director's GUI.