Aaeon SBC-357 Manual page 27

Pin Function
5 IR_TX
4 GND
3 IR_RX
2 FIR_RX
1 V
In single board computer (non-passive backplane) applications,
you will need to connect the power directly to the SBC-357 board
using CN6. This connector is fully compatible with the standard
PC power supply connectors. See the following table for its pin
assignments:
Pin Signal
1 +5 V
2 GND
3 GND
4 +12 V
CC
DC
DC
Chapter 2 Hardware Configuration 19