Asus p5b-mx/wifi-ap 1-33, P5b-mx/wifi-ap internal audio connector cd (black), P5b-mx/wifi-ap usb 2.0 connector – Asus P5B-MX/WIFI-AP User Manual
Page 45: The usb module is purchased separately

ASUS P5B-MX/WiFi-AP
1-33
5. USB connectors (10-1 pin USB56)
These connectors are for USB 2.0 ports. Connect the USB module cable
to any of these connectors, then install the module to a slot opening at the
back of the system chassis. These USB connectors comply with USB 2.0
specification that supports up to 480 Mbps connection speed.
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
6. Optical drive audio connector (4-pin CD)
These connectors allow you to receive stereo audio input from sound sources
such as a CD-ROM, TV tuner, or MPEG card.
P
5
B
-M
X
/W
iF
i-
A
P
R
P5B-MX/WiFi-AP Internal Audio Connector
CD
(black)
Right
A
udio Channel
Left
Audio Channel
Ground
Ground
P
5
B
-M
X
/W
iF
i-
A
P
R
P5B-MX/WiFi-AP USB 2.0 Connector
USB56
USB+5V USB_P6- USB_P6+ GND NC
USB+5V USB_P5- USB_P5+
GND
1
The USB module is purchased separately.