What is this extra connector on my graphic's card?

[firstrig]

Here is a screenshot of my Zotac GTX660 Synergy edition. : http://i.imgur.com/Ok83Z4g.jpg?1

What is the extra connector for? I searched all forums but couldn't figure it out. Is it an audio header? fan speed controller or something else?

 

[siked]

Here is a screenshot of my Zotac GTX660 Synergy edition. : http://i.imgur.com/Ok83Z4g.jpg?1

What is the extra connector for? I searched all forums but couldn't figure it out. Is it an audio header? fan speed controller or something else?

That's the sli bridge for if you want to run 2 graphics cards at the same time