Asus ESC500 G3 - Manual (Page 70)

Chapter 3: Motherboard information 3-22
11. Direct Connector (2-pin DRCT)
This connector is for the chassis-mounted button that supports the DirectKey function.
Connect the button cable that supports DirectKey, from the chassis to this connector on
the motherboard.
Ensure that your chassis comes with the extra button cable that supports the DirectKey
feature. Refer to the technical documentation that came with the chassis for details.
12. Chassis intrusion connector (4-1 pin CHASSIS)
This connector is for a chassis-mounted intrusion detection sensor or switch. Connect
one end of the chassis intrusion sensor or switch cable to this connector. The chassis
intrusion sensor or switch sends a high-level signal to this connector when a chassis
component is removed or replaced. The signal is then generated as a chassis intrusion
event.
By default , the pin labeled “Chassis Signal” and “Ground” are shorted with a jumper
cap. Remove the jumper caps only when you intend to use the chassis intrusion
detection feature.