Asus H610M-IM-A Manual page 27

9. Chassis Intrusion header (4-1 pin_CHASSIS)
This header 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 low-level signal
to this connector when a chassis component is installed. The signal is then
generated as a chassis intrusion event.
Connector type
Chapter 2: Motherboard information
HEADER 4p, K2, 2.54mm pitch
CHASSIS
PIN 1
2-19