On the FAS6290 series controllers, what reference tool lists the on-board 10GbE ports used for the cluster network?

Tech.netwpp.com is not a real or official NetApp documentation resource.

Portconfiguration.netapp.com is not a valid or official NetApp reference portal.

HWU.netapp.com is the NetApp Hardware Universe, the authoritative online tool for determining platform-specific hardware details such as on-board 10GbE port assignments, PCIe slot configurations, and cluster port usage. For the FAS6290, it provides exact information on which on-board ports are designated for use as cluster interconnect ports. No other listed resource is an official NetApp hardware reference for this purpose.

FieldPortal.netapp.com is an internal NetApp partner/field tool and not the public hardware reference for port configurations.

The 'NetApp Cluster Port Usage Guide' is not an official standalone document used for this purpose; HWU is the designated tool.

Synergy is an HP infrastructure composition tool and has no relevance to NetApp FAS hardware port configuration.