SOYO SY-5EH5 User's Manual & Technical Reference page 34

Hardware Setup
PS/2 Mouse
Attach the mouse cable to the 6-pin male PS/2 mouse connector on
the Motherboard to enable PS/2 mouse function.
Universal Serial Bus (USB)
This Motherboard provides a dual-row 10-pin header (one pin is
empty) to support two USB ports for your additional devices. Attach
the USB cable (Optional) to this header as shown in the diagram
below. The USB cable has two USB ports mounted on a bracket.
PS/2 Mouse
Connector
1
5
Connector
PRT 1
COM 2
1
1
4
9
USB
1
COM 1
PS/2 Mouse
Connector
USB
29
SY-5EHM/5EH5 V1.3
KB
KB
KB
Connector
PRT 1
COM 2
1
1
1
COM 1