Ok, so i opened up my wireless router today :P (I have this, "lets open things up" thing

)
i noticed it has 2 antenna connectors, on one the antenna is connected, the other is free. Can someone identify this connector for me? its realy small so i figured it must be something like MC or MCX or whatever its called, but im new to this stuff so i dont really know. I tried searching on google but only thing I could find out that its based on a UNEX design.
I want to see if i can connect 2 antennae or replace the standard one with a better antenna
Any one who can help ?
edit: woops forgot the links to the pics :P
http://www.whacko.nl/pics/rtl8305/31.jpg
http://www.whacko.nl/pics/rtl8305/32.jpg