DISCLIAIMER I take no responsibilty for the fitting of this mod to your car these are the steps i took and should be used as a reference guide only as your fitting may be slightly different to mine.
If you are not sure of your capabilities do not attempt
15 amp fuse
t10 torx driver
terminal screw driver
Disconnect battery and remove
locate fuse box and remove t10 fittings shown in grey the two at the back are awkward to get at.
you will then be met with a rats nest of cables
lay the loom out you will need the red/yellow yellow/brown cable these are for the fuse.
push the relay holder up from the bottom in to the space shown in green.
the fuse carrier is tricky to get out there is a tab that you lever towards you then push the carrier down this will release the carrier.
there is a white plastic holder shown in pic sticking out, which needs to be moved out the way to insert the fuse cables this is done with a terminal screw driver, once done insert the red/yellow yellow/brown cables in to no 22 replace white strip and put carrier back in to fuse box.
in the fuse box there is a black socket with yellow/brown yellow grey cables you connect the male end to this.
feed loom out of box through rubber grommet,fit lid back onto bottom of fusebox, i replaced the t10 torx with self tapping screws for easy removal should i need to gain access again into the box.
there is a thicker red cable connected to the relay this is connected to the main connection bolt under fuse box
there is a yellow black cable on the relay base this is not needed and can be heat shrunk up and took away in the fuse box.
terminate the negative lug to the chassis there is a 10mm nut on the front wing.
feed the loom round the front of car and loosen the front cowling by the rad
pop out pods and feed cables down making sure you have enough slack to connect to back of lights fit lamp holders these are held in with self taping screws connect lights and push lamps into carriers.
moving inside the car you need to get to the foglight switch there is a screw at the bottom of the air vent.
you will be meeted with some more wires pull the connector off the single button switch and push out the old switch and replace with the twin switch.
i found it easier to take the head light switch apart to connect the link cable form the headlight switch pin 9 which is at the top and numbered to pin 4 of the fog light switch.
put switch back together install relay and 15 amp fuse replace battery fusebox lid turn ignition on to acc 2 turn on lights and if you have done it right you should have this.
took about 3 hrs all together but i did have to repair the righthand side of my bumper so the light stayed in place.
hope you find this guide helpful and questions i will do my best to answer them.