Dell OptiPlex 270 Service Manual page 19

1 floppy-drive connector (DSKT)
2 CD/DVD drive connector (IDE2)
3 battery socket (BATTERY)
4 front-panel connector (FRONTPANEL)
5 IDE hard-drive connector (IDE1)
6 serial ATA hard-drive connector (SATA1) 16 microprocessor fan connector (FAN)
7 internal speaker (SPEAKER)
8 standby power light (AUX_PWR)
9 AGP card connector (AGP)
10 PCI riser board connector (PCI2)
Small Mini-Tower System Board
11 CD drive audio cable connector (CD_IN)
12 front-panel audio cable connector (FRONTAUDIO)
13 power connector (12VPOWER)
14 serial port connector (SER2) for optional serial port cards
15 microprocessor and heat sink connector (CPU)
17 memory module connectors (DIMMs 1, 3, 2, and 4)
18 power connector (POWER)
19 RTC reset jumper (RTCRST)
20 password jumper (PSWD)