In order to add a data source to the McAfee SIEM system, you need to open the dashboard for the Enterprise Security Manager (ESM). You need to set up an Event Receiver and then configure it. Access to this setup system is via a button in the dashboard that looks like a circular arrow pointing into its center. This is the Get Events and Flows icon and once you enter that system, the process of adding a data source and downloading a collector is guided.