IBM 8306 - Manual (Page 51)

The following illustration shows the locations of parts on the system board.
1 Microprocessor 9 Battery
2 DIMM connector 1 10 Clear CMOS/Recovery jumper
3 DIMM connector 2 11 SCSI LED connector
4 Power connector 12 PCI slots
5 Diskette drive connector 13 Front panel audio connector
6 Primary IDE connector 14 CD-ROM audio connector
7 Front panel connector 15 AGP slot (some models)
8 Secondary IDE connector 16 Serial connector
Types 8305, 8306, 8309, and 8313
The system board (sometimes called the planar or motherboard) is the main circuit
board in your computer. It provides basic computer functions and supports a
variety of devices that are IBM-installed or that you can install later.
Chapter 5. Installing Options 45