Need help with a bag diagram

I have everything I need to bag the front, I plan to do it in the next weekend or so. I have 4 SMC 1/2" valves, two 1/2" Slam specialties bags, all the fittings and the cups, airline, and an 8 port 5 gallon tank, and my filled nitrogen bottle. I am clueless when it comes to the install. What do I need to "cut off" the nitrogen tank when the air tank is full? I am wondering if anyone has some kind of diagram showing me where the valves should be put, etc, any help or info would be appreciated.