I was reading review of the ASUS P5E3 on the anandtech website. On the picture of the mobo it self I noticed a couple of odd connectors on the back, (see image). What is it, and what are they used for?

Thanks
Edit: Marked the connectors I'm talking about with a red cirkle. Look closely, it's a bit faint.

Thanks
Edit: Marked the connectors I'm talking about with a red cirkle. Look closely, it's a bit faint.