Hi Shehryar,
the RDS you mentioned has just been updated to version 8, and now provides for even better support of connectivity scenarios between SAP ERP and Ariba using HCI. Find the improved Ariba Network Integration for SAP Business Suite rapid-deployment solution version 8 here.
In the cloud Integration Content Catalog (f.k.a. SAP HANA Cloud Integration catalog), a new entry highlights Ariba Network integration using the RDS content with SAP HANA Cloud Integration.
If you were planning to replace the SRM shopping cart and employee self-service scenario with Ariba Procure-to-Pay, you could find the Ariba Procure-to-Pay Integration with SAP Business Suite rapid-deployment solution helpful.
Please let me know how it goes.
Cheers,
Andreas