This is exactly what I used to wire my boat. This product is TOP NOTCH. Basically a plug and play system that is very easy to install.
This is the kit that installed: https://www.ezacdc.com/Scripts/prodView.asp?idproduct=275
The product is expensive but you pay for convenience. The wires are all very cleanly soddered and wrapped. If you are going to get a kit, get a larger one than you think because you will find things to hook up to the system. Also, the kits come labeled with what is meant to be hooked up so it is very user friendly. Hook the nav lights up to the "nav lights" receptical and so on.
Like I said, expensive but I highly recommend this product.