Configuring Visual Composer to Consume Data Sources 
When accessing Visual Composer through a Web browser, you need to define the sources of data that you want to include in your model using SAP NetWeaver Administrator.
You have access to the SAP NetWeaver Administrator of your AS Java.
To consume SAP system BAPIs/RFCs as sources of data in your models, make sure that the relevant systems are correctly defined in SAP NetWeaver Administrator.
More information: Maintaining RFC Destinations
To consume Web services as sources of data in your models, make sure that their destinations are correctly defined in SAP NetWeaver Administrator.
More information: Creating Web Service Physical Destinations
To consume JDBC-based stored procedures as sources of data in your models, run the System Landscape Wizard to define the JDBC system in the system landscape, and then configure its properties.
More information:
To consume services from the Services Registry as sources of data in your models, you need to configure the consumer proxy (define a single Services Registry to be the central one in your system landscape).
More information: Configuring a Central Services Registry
To consume BI queries and query views as sources of data in your models, you first need to maintain a BI server connection in the AS Java of a CE system.
More information: Maintaining BI Server Connections
To consume relational data of non-SAP systems as sources of data in your models, you need to create a system object based on the template BI JDBC System.
More information: Connecting Non-SAP Systems to Visual Composer with the BI JDBC template
To save personalized settings for ALV lists in a Visual Composer model, you first need to enable ALV personalization.
More information: Enabling ALV Personalization