I have been looking around for a while without finding it, so I figured that, but I was hoping I was wrong...
As far as I know, the only air intake (other than the big hole where the soft-top goes) is in the front behind the grill. There are two intake vents there. Use a flashlight and look through the grill and you will see them. I don't know if they are for the AC or just for cabin ventilation.