How can I third party integration with BTP in SAP Ariba Contract Management for e-signature process?

[etas_pwc]

Hello,

I want to ask about a design procedure about BTP. We can establish e-signature integration within Contract Management. However, this integration is only possible with Docusign and AdobeSign in the standard ariba process. These two e-signature programs are not legally accepted in Turkey, so our customer does not want to use these e-signature solutions. They have their own e-signature programs and want to use them. When we did our research, we saw that we could do this design with BTP (Business Technology Platform).  How can we do this design? If there is a document, or a KBA, explaining how to establish third-party integration with BTP, can you please direct to me?

Best Regards.