I want to wire 2 switches to my pump and exhaust hood. I plan on using a standard outlet, plug each load into it, wire 2 switches and put the whole thing in a small project box. It will then be plugged to my wall using an extension cord. I found this diagram on how to wire a switch. Pretty easy to do but if i want to add my second switch, can i splice the incoming power and run a white and black wire to the 2 bottom screws of the outlet ? I will also break the tab on the hot side...btw, the extension cord will be plugged in a gfci outlet in the wall