You're looking in the wrong place!!
The Audio Gateway (AGW) is in the passenger footwell - the only thing in the trunk thats audio related is the DVD Drive for Navigation and Sirus stuff, if you have those options
Lift the carpet back at the front of the passenger footwell (the bit where your feet are, at 45 degrees, and you'll see a grey foam pad. Remove this, and you'll see the electronics bay cover - there are 3 (I think) plastic nuts, two on the floor and one one the centre of the panel - remove these and you'll get to the AGW
The Audio Gateway (AGW) is in the passenger footwell - the only thing in the trunk thats audio related is the DVD Drive for Navigation and Sirus stuff, if you have those options
Lift the carpet back at the front of the passenger footwell (the bit where your feet are, at 45 degrees, and you'll see a grey foam pad. Remove this, and you'll see the electronics bay cover - there are 3 (I think) plastic nuts, two on the floor and one one the centre of the panel - remove these and you'll get to the AGW