Posting on behalf of one of my customers.
We have a PCIE card with 4 indemendent Broadwell-U processor complexes. Since we don't have a physical serial console connected to the Broadwell-U processors, so we relay on AMT to provide the serial console using the AMT SOL feature.
AMT is provisioned directly on each Broadwell-U via a utility that uses the AMT SDK. It follows the procedures indicated in the AMT SDK for EHBC, configuring each Broadwell-U to AdminControl Mode. AMT SOL and VNC are enabled as well.