Help Please!! Control pin?

IO orderd some stuff for my MODs from MadVapes last week and got the package today, I was pretty excited because I also got the Tekkeon that I am going to MOD (thanks for a great idea Parky50!!!). Anyways when I opened the package I was very happy, I got everything I ordered and a couple extras (flashlight and a piece of circuit board) but one thing had been changed on my order. The regulator that I bought as a "just in case" was not the one I ordered, this one has a control pin. I have heard of people talking about control pins before but never fully understood what they do and how you hook them up, I am a mechanic and machinist/metal worker so I am very good at making things just not nearly as good at electronics. Okay well I suck at electronics

So if anyone could offer some advice on this it would be appreciated, I went and looked on MV's website and read that this regulator can be hooked up without the control pin and there is a wiring diagram (which I barley understand). Really I just want to know what it does and if I should even use it or not.

 

Thanks... I said in the OP that I saw the schematic but I just didn't know what it did so thanks for telling me It says it can be used without using the control pin so I think that is what I will do.

chev326fox