IBM THINKCENTRE 8086 - Manual (Page 25)

Locating components
The following illustration will help you locate the various components in your
computer.
1 PCI riser 5 Hard disk drive
2 Power supply assembly 6 Cable clip
3 Optical drive eject button 7 Fan bracket assembly
4 Optical drive
Identifying parts on the system board
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 1. Installing options 11