Go to Preferences -> Data Sources. In the Connections panel click the New button.
Enter a unique name for this connection and select one of the previously configured MarkLogic data sources from the Data Source combo box.
Fill-in the Connection Details:
The host name or ip address of the installed MarkLogic engine.
The port number of the MarkLogic engine.
User name to access the MarkLogic engine.
Password to access the MarkLogic engine.
The url used for browsing MarkLogic database.
Click OK.