Judging from the picture, the front panel connections are either the pins on the bottom left hand corner. They however could be HD Audio. So the second possible area they could be at are the pins right below your southbridge heatsink which are the ones between your Sata 2 ports and your USB 2.0 ports at the very bottom of the motherboard, slightly to the right.
These are all asumptions i made from looking at the pictures. I strongly recommend you rely back to your user manual and installation manual