The Data Source Manager helps to specify either the SCADA data table and table related attributes that are going to be used to fetch the data to the SCADAConnect or the computer name and server which hosts the OPC server software. The OPC server can reside on the computer running the model or any other reachable computer. The OPC server must be set up beforehand. Depending on the SCADA connection created on Connection Manager, following type of database sources can be selected. So, it is necessary to create a SCADAConnection on Connection Manager first.