Bill:
Not being fully familiar with your switch is not a problem. You really only need to cut power such that the ECU or Ignition box (MSD for example) along with the pumps and FIELD are killed. As I said, I did this with the feed to the stock switch-kills everything without having any other switches involved. Your setup uses a start panel I assume and that would be fed on its own fuse the same as I am doing.
If you can scan a drawing and e-mail it to me I will edit as needed. It really is simple Jim