NEC Express5800/R310g-E4 User Manual page 36

Chapter 1 General Description
(11) Connector for PCI riser card
(R320g-M4 model only)
(12) Management LAN connector
(13) Internal USB cable connector
36
-
-
Internal USB cable is optional.
Express5800/R310g-E4, R320g-E4, R320g-M4 User's Guide
4. Names and Functions of Components