Dell Vostro 400 (Mid 2007) - Manual (Page 107)

Removing and Installing Parts
107
10 serial ATA drive
connector (SATA0)
11 serial ATA drive
connector (SATA1)
12 CMOS jumper (CLEAR
CMOS)
13 password jumper
(CLEAR_PW)
14 front panel connector
(F_PANEL)
15 serial ATA drive
connector (SATA4)
16 front USB connector
(F_USB1)
17 serial ATA drive
connector (SATA5)
18 front USB connector
(F_USB2)
19 front FlexBay
connector (F_USB3)
20 system fan connector
(SYS_FAN1)
21 front audio (F_AUDIO)
22 PCI connector (PCI2) 23 PCI connector (PCI1) 24 PCI Express x1
connector (PCIE_X1)
25 PCI Express x16
connector (PCIE_X16)
26 audio connectors 27 2 USB and 1 LAN
connector
28 2 USB connectors 29 chassis fan connector
(CHASSIS_FAN)
30 video connector (VGA)
31 power for cpu
(ATX_CPU)