Use the Integration Designer to manage data at the application level. In the Integration Designer, you can access a comprehensive view of all business objects in your application and their associated data, such as references, data sources, and data views. You can easily create and modify data objects and connect to data sources.
In the navigation pane of App Studio, click Data.
Locate each data type that is marked SIMULATED, and click the FIX NOW link to configure that data type to connect to real data.
For more information, see Managing data and integrations with the Integration Designer.