Hi Mangesh:
I reached out to John Hall with the Ariba Partner Support team. He recommended that you work through your client to contact the Ariba delivery team to access the documentation. If you're uncertain who the team is, you can send your client's name and region to SRMCloudEnablement_PartnerSupport@sap.com for assistance.
Regards,
Debbie Curtis-Magley
Ariba Exchange Community Manager