Dell OptiPlex 5055 Small Form Factor Owner's Manual page 42

13 SATA2 Connector Black Color (SATA2)
15 ATX Power Connector (ATX_SYS)
17 HDD&ODD Power Cable Connector (SATA_PWR)
19 Internal Speaker Connector (INT_SPKR)
21 SATA 1 Connector White Color (SATA1)
42 Disassembly and reassembly
14 SATA0 Connector Blue Color (SATA0)
16 Front USB2.0 Connector (Front_USB)
18 Clear CMOS Jumper (CMOS_CLR); Clear Password Jumper
(PASSWORD_CLR); Clear Password ; Jumper
(PASSWORD_CLR); Service Mode Jumper
(SERVICE_MODE)
20 Internal USB Connector (WF_BT_USB)
22 Battery Connector (BATTERY)