User`s manual

2: Mainboard Installation
7
Optional Extension Brackets
You also have a USB module extension bracket for this mainboard.
Install it by following these steps below.
Extended USB Module
This module bracket has two USB ports for more USB devices
(USB port 3-4).
1. Locate the USB1 header on the mainboard.
2. Plug the bracket cable onto the header.
3. In the system chassis, remove a slot cover from one of the
expansion slots, install the extension bracket into that emptied
slot, and then screw this bracket firmly to that slot.
JUSB1
VCC
UV-
UV+
GND
GND
GND
NC
UV+
UV-
VCC