Asus Z9PE-D8 WS - Manual (Page 60)

2-38 Chapter 2: Hardware information
12. Auxiliary panel connector (20-2 pin AUX_PANEL1)
This connector is for additional front panel features including front panel
SMB, locator LED and switch, chassis intrusion, and LAN LEDs.
(1) Front panel SMB (6-1 pin FPSMB)
These leads connect the front panel SMBus cable.
(2) LAN activity LED (2-pin LAN12_LED)
These leads are for Gigabit LAN activity LEDs on the front panel.
(3) Chassis intrusion (4-1 pin CHASSIS)
These leads are for the intrusion detection feature for chassis with
intrusion sensor or microswitch. When you remove any chassis
component, the sensor triggers and sends a high-level signal to these
leads to record a chassis intrusion event. The default setting is short
CASEOPEN and GND pin by jumper cap to disable the function.
(4) Locator LED (2-pin LOCATORLED1 and 2-pin LOCATORLED2)
These leads are for the locator LED1 and LED2 on the front panel.
Connect the Locator LED cables to these 2-pin connector. The LEDs will
light up when the Locator button is pressed.
(5) Locator Button/Swich (2-pin LOCATORBTN)
These leads are for the locator button on the front panel. This button
queries the state of the system locator.