Ok, so one end goes at the front, but where do you direct the other end? At the calliper, at the disk or in the general direction of the "brakes"?

Come on, someone must know. This has got to be the cheapest brake upgrade going, surely someone has tried it or have I just got to wing it? :D

Ideally, with vented discs, at the centre of the disc, so the airflow through the cooling vanes is increased. Proper kits have some kind of shroud, so the air is really forced through.

Assume you mean the outside (if you have it laying horizontally )not at the bit that attaches to the hub. Just curious as this has got to be the best way to stop "brakes" overheating / warping. At under £20 to do its got to be cheaper than changing pads, fluid, disks, which I've already done.