Just copied this from my Profile
Pre / Post facelist have the plug for the switch wiring in different places too I think. pre facelift is behind the drivers side tweeter cover.
ok so here goes
the fogs themselves were installed by the bodyshop when it was in for all the work so that steps skipped
onto the wiring
1st of all i had the Wiring harness & relays
now to find the plug... underneath the dash somewhere... after a bit of searching... nothing. after a longer search with a torch i eventually found the plug taped up high up behind the airduct under the drivers footwell
from this pic you can just see the blue tape high up behind the ducting
and here a better pic
once uptaped hanging down, i connected that part of the harness to the plug
then next time to connect the rest up.
open up the fusebox and upplug the big 20 pin connector and plug it into the harness, then plug the harness back into the fusebox where you removed the connector
then position the harness neatly away with the rest of the wiring with a few cable ties.
thats that part done!
Now to the switch part
so my cars a pre-facelift so the free places for the switch to go are behind the handbrake just in front of the 'sex blocker'
so i open the cover and take a look for the connector plug
hmmm nothing there
so i removed the whole centre console (which i found later i would have to do anyway to run the new wires neatly)
still nothing

back to the tinterwebs... after some researching (thanks aardvark) i found that the pre-facelift connector is located behind the drivers side tweeter cover
but i had a JDM switch, which had a completly different connector, which i didnt have

but after some searching in the garage i found 1
so next thing was off down my mates garage to borrow his wire tester...
a short while later, we'd figured out the correct wires... some wires are not needed
then gave it a quick test to double check it worked
so onto the next, running the extra wiring to where i wanted the switch to be.
so i ran a piece of wire back through behind the tweeter under the dash and down the centre console to just past the handbrake and cut to length
then i cut another 2 pieces to the same length, then to make sure i knew which end was which, i taped the ends different colours
then proceeded to wire both ends up
with that done, only thing left was to put everything back into place, wires neatly tucked away behind the tweeter cover and centre console back in place