computer mount install. Pass Seat Bolt type/size ???

I am going to install a computer mount in my friends 2007 Tahoe.
It is attached via the passenger seat bracket bolt.

Does anyone know what type and size socket I will need for these bolts.
The front and back are different. I am not sure if I will need to loosen the back.

Link to pic of bolts.
http://fbcnj.com/07tahoe.jpg

The computer mount I am installing can be seen on eBay.
Item # 330116925672

Thank you in advance for your time and help.

Greg

They both appear to be something like a Torx. If a Torx socket won't work, sometimes a regular six point socket will work.

Thanks 73shark. I will try a torx.

I was able to use a 15mm 12point socket on the front nuts. I didn't have to loosen the back. The socket need to be long tho.

Thanks again for your help.

Have a good one.