the pod mounts to the door via factory locations. If I recall, there is only one or two screw locations that actually mount the plastic tweeter pod to the door shell. Just take your tweeter pod and look for the pre-drilled holes and try to match it up w/ pre-drilled holes in the door. That's how mine was. It's really a simple process, but if your car didn't come with the bolt locations, then you may have to drill some yourself.