How to attach a cable to connect an additional USB port to a computer

USB is a very common connection standard used to connect external devices to computers. Currently on the Mainboard there are quite a few USB connection ports, in addition to the ports located on the front and rear of the case, there are additional spare pins located on the internal motherboard to be used when needed.

How to attach a cable to connect an additional USB port to a computer Picture 1 The USB pins are on the motherboard

The USB pins located inside this Mainboard are often used to connect to the USB ports available on the case (case, Case), USB stations are added on the front or back of the case. 

How to attach a cable to connect an additional USB port to a computer Picture 2 USB docking station that attaches to the front of the case

How to attach a cable to connect an additional USB port to a computer Picture 3 The USB docking station snaps into place on the back of the case

Because there are many different types of motherboards and cases, and docking stations, the connectors are also arranged differently. Here's how to connect common USB plugs.

How to connect USB terminals

2x5 connectors (2 USB ports)

How to attach a cable to connect an additional USB port to a computer Picture 4 2x5 connectors (2 USB ports) 

1. Red (red): + 5V / Voltage + / VCC
2. White (white): USB - / Data - / D -
3. Green (green): USB + / Data + / D +
4. Black (black): GND / Voltage - / Ground
5. Black (black or gray): S-GND / Over Current

The S-GND wire is an anti-interference ground wire, it is usually louder than other wires due to merging the 2 wires of 2 USB ports into one, some plugs do not have this wire.

How to connect 2x5 wires on some Mainboard pins

How to attach a cable to connect an additional USB port to a computer Picture 5 How to connect 2x5 wires on some Mainboard pins

How to attach a cable to connect an additional USB port to a computer Picture 6 How to connect 2x5 wires on some Mainboard pins

How to attach a cable to connect an additional USB port to a computer Picture 7 How to connect 2x5 wires on some Mainboard pins

1. If the plugs are not in the correct positions for the pins, you can change the positions of these wires (see instructions on how to change the wire positions below).

How to attach a cable to connect an additional USB port to a computer Picture 8 How to connect 2x5 wires on some Mainboard pins

Other types of plugs

How to attach a cable to connect an additional USB port to a computer Picture 9 Other types of plugs

2 re-entered 1x4 plugs will be equivalent to 1 2x4 or 2x5 plug (do not use 2 S-GND wires).

How to change the position of the wires of the usb connector

Structure of the plug

How to attach a cable to connect an additional USB port to a computer Picture 10 Structure of the plug

How to change the position of the plug wires

1. Each plug has plastic locks to hold the contacts of the wires.

How to attach a cable to connect an additional USB port to a computer Picture 11 How to change the position of the plug wires

1. Use a thin blade to pry up the plastic buckle of the plug and pull the cord out of the plug.

How to attach a cable to connect an additional USB port to a computer Picture 12 How to change the position of the plug wires

1. Re-plug the wires into the correct position to change.

How to attach a cable to connect an additional USB port to a computer Picture 13 How to change the position of the plug wires

1. Do not pry too hard to avoid bending or breaking the plastic buckles, this can change the wire position of any type of plug.
2. When changing the wire, pay attention to the position of the power cord (VCC, +5V) or it may damage the Mainboard or USB device.
3. The USB pins usually have a symbol on the Mainboard (USB, F_USB, Front USB, .) or are specified in the manual, and pin 1 is usually the position of the red wire (VCC, +5V). .

Lesley Montoya

Update 08 May 2023