Well I hope that this helps anyone that is on the edge or about to do this install.... really not too difficult and looks killer! 5/10 for difficulty with the hardest part being the splicing of the wires.
So I installed these today in my GT (non convertible), took just over an hour (including taking photos etc):
1. So what comes in the box?
You get the door sills x2 (Left / Right)
Zip ties x6
Wiring with lighting
Alcohol wipes x2
Instructions (Touch and go if you are not confident at this stuff)
2. Disconnect the Negative terminal from the battery. You will need an 8mm socket wrench.
3. The next step is to partially remove the passenger side A Pillar (you don't need to fully remove this). Start at the end furthest away from the dash and just grab it either side and give it a good tug and work your way forward.
You should be able to see the cabling hidden behind the pillar, disconnect the wiring plug
4. Now you will need to separate out the specific cables that you will need when you start to splice in the supplied cabling (Red and Black cables) in the kit. You need to find the "Black/Light Blue" and the "Yellow/Green"
The 2 at the top left!
5. Now comes the tricky part (well not really) - The Wiring! So we need to attach the supplied wires (Red / Black) into the current wiring ("Black/Light Blue" and the "Yellow/Green"). To do this I used splicing taps which are a little easier than cutting the wire cover off from one wire and soldering the new wire to it.
So you will need the Red wire (supplied) to connect to the Black/Blue (in car already) and the Black wire (supplied) to connect to the Yellow/Green:
Once happy, use electrical tape to wrap each connection individually, I then used a zip tie to tidy the cables and keep it out of the way. (Unfortunately you cannot tell if there is power running to the cables as the battery is disconnected.... you could always reconnect the battery to see if it all working at this stage and your connections are good.... don't forget to disconnect again when you continue)
6. You should now have something that looks a little similar to this:
(I separated the wires so that I knew what I was working with.... the short cable stays on the passenger side and the longer cable I placed across to the drivers side)
7. Now remove the passenger door sill, again it is a grab and a quick pull up to make it release.... the clips are sturdy so you can use a bit of force.
Here is the underside so you can see what you are dealing with:
8. Here you will need to remove (or pull forward) the passenger kick panel so that you can run the wires now towards the floor and along to where the new door sill will be.
I actually used some tape to keep the wire in place down the crease so that I didn't pinch anything when putting the panels back in place.... would be a shame to get this far and do something to ruin it all! This doesn't have to look tidy as it will all be hidden when the panels are put back in place.
9. Once happy with your wiring, you can replace the kick panel, leaving the wire that is to be wired to the drivers side free to be run across. You will now need to run the wire to the new passenger side door sill and connect it up ready for placement. Before you do this, rub the area where the M3 tape is going to stick with the alcohol rub and then fit the new door sill. Again be careful not to pinch any wires.
Once in place it should look like this:
You can now put the passenger A Pillar back to normal.
10. We now need to run the cable across to the drivers side. Use the zip ties supplied to attach the cable to current cable just behind/below the glove box. I attached the zip ties first but only loosely so they were hanging from the current car wires and then ran the new cable through them and then tightened them..... found this was an easier way to do it.
Once happy, cut back the excess plastic from the zip ties and then rotate them so that there are no sharp edges to catch on passengers legs.