Lenovo THINKSERVER RS210 - Manual (Page 116)

System-board external connectors
The following illustration shows the external connectors on the system-board.
Microprocessor
Heatsink Orientation DIMMs DIMMs
1 Serial (com 1) connector 5 Ethernet connector 2
2 Video connector 6 USB connectors 3 and 4
3 Ethernet connector 1 7 SW1 (NMI button)
4 USB connectors 1 and 2
108 ThinkServer ThinkServer RS210, Types 6531, 6532, 6533, and 6534: Hardware Maintenance Manual