Air inlet is right next to the fog light on the passanger side.
Air outlet is at the front of the passanger side wheel arch (looks like a 'grated' section).
no need to chop up your bumper to allow air flow as it already has a pretty good cooling system.
Also bear in mind that diesle turbos dont get anywhere near as hot as petrol turbo's so the air flowing through the SMIC (side mount intercooler) is alot colder than that of its petrol equivelents