Rear view for X20, X21
1 Headphone jack
2 Mic jack
3 Compact flash slot
4 PC card slot
5 PC Card eject button
6 Security keyhole
7 Power jack
8 Universal serial bus (USB) connector
9 External-monitor connector
10 Line-in jack
11 LAN connector
12 Modem connector
6
7
Rear view for X22
1 Headphone jack
2 Mic jack
3 Compact flash slot
94
ThinkPad X20, X21, X22
8
9
3
2
1
10
11
5
4
12