Most readers also have a USB socket and the second part of the dual USB socket is probably for that. The first uses 1,3,5,7 and the second connection uses 2,4,6,8. Each MB connector like this is for two USB ports. Notice one pin is missing for orienting the plug. This is shown from above the motherboard and the card reader would normally plug into this. This shows the pinout of a USB cable at both ends: or this: Īnd this is what the average motherboard USB connector looks like: You would need some small shrink tubing, soldering iorn and solder. Most card readers use a standard plug on the end of the cable to interface with the motherboard card.
Then you can make up a cable using a old six pin USB cable.
What you need is the pinout of the card reader and a regular USB port. Well, you would normally want to use USB 2.0 with a card reader.
