Yeah, it should be for the air flow sensor that plugged into the standard air box, front right hand corner. It's the little plastic pyrimid thing with a small round ball on the top that you pulled out the standard air box. Sorry for my pants discription. :P
On your new induction pipe, there should be a hole on the side near the filter end. The air flow sensor needs to be extended to there and pluged into the side of the new induction pipe. Basically, cut it so you have enough to strip back the wires on both ends, solder the extension bit in the middle making sure that you connect the correct coloured wires together. Best to also use some heat shrink to cover the cut wires and soldering...you can pick this up from the big 'H'.
Also, cover the whole length of the wire in black tape...just to make it a bit safer!
Plug it in and thats it...job done...don't be affraid, it's really quiet easy!!