Asus Vintage - Manual (Page 35)

ASUS Vintage-S800 barebone system 35
2.10 Re-connecting cables
You may have disconnected some cables when you were installing
components. You must re-connect these cables before you replace the
chassis cover.
LED cables
Connect the power switch and power LED cables to their respective
leads in the PANEL1 connector on the motherboard.
Connect the HDD LED cable to the 2-pin lead marked IDE_LED1.
Power switch
Power LED
HDD LED
PANEL1
F_PANEL1
PLED- PWR PLED+
Ground
GND
Reset
IDE_LED+ IDE_LED-
PLED
RESET
PWRBTN*
HDLED
* Requires an ATX power supply.