quad g5, trying to install bluetooth card

i've just bought a combined bluetooth and airport card for my quad g5, but can't figure out how or where to install it. i have the two antenna leads but can't help thinking i'm missing something. any help gratefully recieved!
(here are some pics . . )
inside the computer:



the card:



cheers!

Follow the 4 RAM slots up and you'll see another slot that looks similar, but is much smaller and towards the left (in the image). That's where it is installed.

thanks surfwax, thats where i thought it would go - it looks like a standard airport slot, but if you look at the card i've been sold, (apple even checked against the serial no. of my machine to make sure), it's connection is way smaller?? guess i'll try calling apple tomorrow . . .
cheers

just to say i've solved the issue . .
i also need a 'runway card' to use the wireless card they sold me saying thats all i needed,(it took them nearly 2 hours on the phone to find this out!!) more expense, and another ripple of apple discontent!!