To open the Warehouse Source notebook:
If you are defining a new warehouse source, right-click the Warehouse Sources folder and select Define.
If you are modifying an existing warehouse source, expand the Warehouse Sources folder until you find the warehouse source you want to work with. Any existing warehouse sources are displayed in the pane on the right side of the window (the contents pane). Right-click the warehouse source you want in the contents pane and select Properties. The Properties notebook for the warehouse source opens.