I installed one on my 2011 SV. The wiring harness is already in place and Nissan has an adapter that you can buy that plugs right into the harness underneath the steering column. It is very easy to do. The only problem is where to loacte the controller. You also have to convert your original 4Pin to a 7pin for the e-brake controller to work. This is also easy since Nissan sells a complete wiring harness for this too.
BTW: The two air niples are for my AirLift 1000 spring support bags.