Can't find any info on these connectors

May be the front panel USB 2.0/3.0 connectors, may depend on your mobo model but check the image here.
http://rog.asus.com/forum/showthread.php?39176-ASUS-Maximus-VI-Formula-mainboard-USB-question

Or you may find more images with tags here, or do a similar search for images with mobo model.
https://www.google.com/search?client=firefox-b&hl=es-419&site=imghp&tbm=isch&source=hp&biw=1366&bih=629&q=Rog+Ext.+headers&oq=Rog+Ext.+headers&gs_l=img.12...0.0.1.183.0.0.0.0.0.0.0.0..0.0....0...1ac..64.img..0.0.0.j9c3KZe5l_I#imgrc=hIXi8rgdkYxO5M%3A

You may also find the actual use for those headers in the mobo model PDF manual found in the model Asus web page > Support > downloads.