There are wiring instructions in the CK-7W manual that you will get with the kit. You'll need to remove some panels to pass the wires etc, and the stereo and glovebox as mentioned above, but the rest is pretty straightforward. The guy who fitted mine took about 90 minutes for a nice neat job, but had no instructions to lt me copy - he just knew how to do it...
Can send you the CK-7W manual or maybe copy some pages if you need.