Lenovo THINKCENTRE 8177 - Manual (Page 114)

Identifying parts on the system board
1 Microprocessor 9 Secondary IDE connector
2 DIMM connector 1 10 SATA1 connector
3 DIMM connector 2 11 SATA2 connector
4 DIMM connector 3 12 Power switch/LEDs connector
5 DIMM connector 4 13 Clear CMOS/Recovery jumper
6 Power connector 14 Battery
7 Diskette drive 15 Front panel audio connector
8 Primary IDE connector 16 PCI slots
17 AGP slot (some models)
108 Hardware Maintenance Manual