the edge comp taps into the pump wire. It should have come with a wire tap. You don't actually have to cut any wires, the tap just pierces it. The best way to do it though would be to get a "stealth" cover for your pump that will pierce the same wire inside the pump, or better yet would be to cut the pump wire and solder it fast and then put heat shrink over it. Either way you go, its nothing real hard to do.
All the hire horsepower boxes require you to do this, no matter who makes it. You can go with a Edge EZ or Quadzilla XZT+ for example, and they are just "plug and play" type boxes, but then you will only get about 65-70hp out of them. Ofcourse, theres also the Smarty programmer, but some guys seem to like the XZT+ better driveability wise.