1. If you look at YOUR post, there is an 'edit' button. Click on it.
2. NOW, go to the bottom- see the button "Go Advanced"? Click on that.
3. FIX THE SPELLING IN THE TITLE.
4. I dont know where to put the switch, but wherever you put it, TEST IT FIRST in a non-permanent way. The computer may test for continuity at the pump or at the relay. Do you have the schematic??? That would likely indicate which circuit might have current monitoring.