Dell XPS 2720 Owner's Manual page 16

13 I/O-board connector (REAR_IO1)
15 password jumper
17 optical-drive data-cable connector
19 hard-drive power-cable connector
21 LVDS-cable connector (LVDS1)
23 processor socket
25 processor (4-pin) power-cable
connector
16
| Technical Overview
14 I/O-board connector (REAR_IO2)
16 hard-drive data-cable connector
18 optical-drive power-cable connector
20 main (8-pin) power-cable connector
22 LVDS-cable connector (LVDS2)
24 touchscreen-cable connector
26 processor heat-sink fan-cable connector