It will include the expander/backplane hardware necessary to connect all the drives.  The H710 supports up to 32 drives.
We are spec'ing a Dell R620.  It can be configured for 10 internal 2.5" drives, but the "Help Me Choose" on the controllers implies that the H710 connectors have a maximum of 2x4 = 8 drives. Are there connectors for the H710 that allow a single card to control (RAID) all 10 drives? Thanks.
PERC H710-- How many drives can it connect to?