I decided to do this on my 2013 with the kit from Shelby and ran into an issue I will try to sort out tomorrow. The instructions show an ignition harness with 5 wires coming out. I have 12 coming out of mine so was getting confused on what needed to be tapped into. I couldn't find a wiring diagram either. The instructions specifically call out a blue/white wire and a blue/grey wire. Well I have no blue/grey wire. I took a chance by using the PIN numbers that were called out and tapped into a small solid blue wire (I also see a thicker blue wire) and while I have power to the push button (it lights up when the ebrake is up) and toggles on and off with the ebrake as expected, it wont start the car. The key still works because I chose not to cut anything such that the push button was the only way to start the car. Has anyone else installed one of these yet on their 13? Ive also emailed the guys at SPP letting them know their instructions aren't right, at least for 2013 models. If I end up finding a diagram and getting it sorted out I will update this post. Hopefully it will help anyone else who decides to do this.