Help Needed

[FrankyGTI]

Hey Guy's..

My name is Philip, and I live in Johannesburg, South Africa.
I drive a 2009 Peugeot 207 GTI, which is my pride and joy

Yesterday I bought a HFS-2 kit from somebody over a local online advertising site.

The kit is brand new and was still sealed in the box.

I managed to follow simple online instructions on how to install everything.

All the hardware is installed in the correct way as well as the wiring (as far as I know).

A couple of things I just cant figure out and I don't want to take a chance and mess around, so I'm hoping somebody can give me some advice..

1. On the "POWER" cable, there is a purple wire that the diagram I have states that it must go to the headlight switch... Is this a positive or negative switch???

2. Included in the box was a "USER" cable, is this wire needed?? Again, in the diagram I have, this cable is not used...

3. On the "ECU" cable.. Well to put it in simple terms... WTF?? lol.. Were to I tap this in exactly, and what wires to I utilize???

I hope to here from someone here soon.. as i am suffering with major detonation as a result of this country's poor fuel quality.. 95RON is the highest you get here... And the last thing I want to do is break a piston.