subverbal

I need to replace the standard air filter in my MY96 but as I didn't personally remove it I'm after any advice on refitting.

I've only had a quick glance so far but did notice the hole in the wing - is this something to do with the resonator box??
Are there any web pages out there with induction filter fitment steps??

Probably blindingly obvious but I thought I'd surf the knowledge pool first!

Neil.

ps. Anyone want an HKS Powerflow ????? Only going as I'm selling the car.