24(13) Serial-ATA Port connector: SATA1/SATA2/SATA3/SATA4This connector support the provided Serial ATA IDE hard disk cable to connecting themotherboard and serial ATA hard disk.Serial-ATA Port ConnectorSATA2SATA1Pin 1SATA4SATA32-6-2 Headers(1) Line-Out, MIC Header (9-pin): AUDIOThis header connect to Front Panel Line-out, MIC connector with cable.Line-Out, MIC HeadersAUDIOPin 1AUD-MICAUD-FPOUT-LAUD-MIC-BIASAUD-FPOUT-RHP-ONAUD-GNDAUD-VCC2910(2) USB Port Headers (9-pin) : USB3, USB4The header is used for connecting the additional USB port plug. By attaching an optionUSB cable, your can be provided with two additional USB plugs affixed to the backpanel.USB Port HeadersPin 1USB4VCC- DATAGND+DATAVCCOC-DATAGND+DATAPin 1USB3VCC-DATAGND+DATAVCCOC- DATAGND+DATA(3) Speaker connector: SPEAKThis 4-pin connector connects to the case-mounted speaker. See the figure below.(4) Power LED: PWR-LEDThe Power LED is light on while the system power is on. Connect the Power LEDfrom the system case to this pin.