The only problem you may have with this hammer is that you have to mount it on top of the breaker panel. The connected ground wire is short-circuited. To get to the ground bar at the top of the panel you need to place this switch on top to get to the short wire bar. This ground wire is wire #8. Fairly rigid and thick. I don't think you want to weld anything to it to get to the bottom rail in your box.
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