Lenovo THINKCENTRE 6019 - Manual (Page 122)

Computer components
The following illustration will help you locate the various components in your
computer.
1 PCI riser 6 System fan
2 Power supply assembly 7 Internal speaker
3 Optical drive eject button 8 Cable clip
4 Optical drive 9 Rear fan bracket assembly
5 Hard disk drive
116 Hardware Maintenance Manual