How to migrate data from SAP ECC to Ariba Spend Visibility?

Hi

I need to extract the historical data of 3 years from different sources( SAP ECC and other Third party systems) and then load it to Ariba Spend Visibilty.

I am looking at extracting the files from source system and sending those files to Ariba Data Transfer Tool to load into Ariba Spend Visibilty.

Please let me know if this is feasible. Are there any other ways to do it.

I would appreciate if someone could point me to the documentation for the different ways of integration..

Thanks,

Suma