Hi Leticia,
Please have a look at SAP Help. E.g. you can go via Analysis Scenarios to Transport Order Execution. Here the complete Data Flow can be found, incl. the DataSources.
If it cannot be found here, then probably you will have to build it yourself. For the extraction you can build a Generic DataSource based on a table or view (t/code RSO2).
Best regards,
Sander