Depends on what you're referring to, but what I can see is the CPU Socket, a couple of RAM slots directly below that, and what is probably a PCIE slot for a wireless card to the RAM slot's left.
Ok sorry I forget to explain wat I ment by free socket. I ment the free space where you can solder on a VGA processor with 4 placase for the VGA RAM. Or that is what I'm assuming that Free space is for, right under the battery connection.