MSI 694D PRO Manual page 22

2.8 HP Infrared Module Connector: J3
The mainboard provides one infrared (J3) connector for IR modules. This
connector is for optional wireless transmitting and receiving infrared module.
You must configure the setting through the BIOS setup to use the IR
function.
VCC
1
NC
IRRX
GND
IRTX
J3
2-17