Lenovo ThinkCentre E50 -FR - Manual (Page 13)

The following illustration shows the locations of parts on the system board for
some models.
1 Microprocessor and heat sink 10 SATA connectors (2)
2 Microprocessor fan connector 11 Clear CMOS/Recovery jumper
3 Memory connector 1 12 Power LED connector
4 Memory connector 2 13 Front USB connector
5 Power connector 14 Front audio connector
6 Diskette drive connector 15 PCI adapter connectors
7 Secondary IDE connector 16 AGP adapter connector
8 Primary IDE connector 17 System fan connector
9 Battery 18 12v power connector
Chapter 1. Locations 5