If you are not part of the community, I highly recommend that you join. There are over 1060 partner colleagues in this community sharing insight about their real world integration implementations. My colleagues and I share key documents and updates here as and when they are ready for partners to view. I also announce training events in the community. You get the idea. It is good to be a member. Contact my colleague Lillian dot balenbin at sap dot com for access with some proof of your partner credentials to get an invitation.
If you are an existing member, check out the new Side-by-Side HCM deployment model page. I added a new presentation on the deployment model there.