Replacing the Centurion was a little harder than replacing a Magnetek. The breakout box is harder to get out, and the whole back of it needs to be cut out. I wanted to retain the old breakout box so I wouldn't have to fabricate a way to screw the face plate back on.
For the Charge Wizard I cut a hole in the cabinet divider, that separates the water pipes, heater, etc., from the electrical stuff. I then just ran the wire behind the water heater door, and used the double sided tape, that was provided, to affix it to the cabinet.
