Re: change switch to outlet and switch
To answer your question, on the combo unit the Hot (usually black) would connect to the side that is jumped together, on the other side common ( usually white) would be connected to the screw on the side of the outlet, and the wire going to the load (light) would be connected to the screw on the side of the switch.
If the existing switch is a 3-way, that is one of a pair of switches for the light, it will depend on what wires are in this switch box. If you have a red, white, and black connected to the switch and no other wires in the box then the combo will not work.
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