Referring the Intel® Server Board S2600BP and Intel® Compute Module HNS2600BP Product Family Integration and Service Guide .
1. #558210 - Intel Omni-Path Fabric Carrier Card Fab3 - Design Kit - Revision 2.2
2. #554502 - Riser Card .
From the Step File Of The Riser Card - Its Clear that the Riser Card will not mate With the S2600BP design.
Could you Locate us to the right Design of the Riser Card For Buchanan Pass.