I have to add an on/off switch to an old Deluxe Big Muff. right now the leads are just wired together to be always on. I purchased a DPDT slide switch as it was the only one that fit correctly in the chassis of the pedal. Now here is my very simple question. Which leads on the DPDT should I use for the simple on/off? Here is a picture of the type of switch that it is. It has six terminals on it. I need to know what the terminals correspond to when the switch is not hooked up; ie. which ones can I use for which purposes? Which two should I use across for the simple on/off? Thank you!