Undo screws from switch. Carefully (very) attach short piece of wire to each terminal (trip main c/b first!). Connect each wire to small piece of metal foil. Rebuild switch. Stick pieces of foil on opposite sides of switch. When 'mate' touches switch, he will complete the circuit with his fingers.......
Alternatively, position mousetrap over switch!
PS - I was only joking in case the huggy-fluffy health and safety or other such nannies are reading! Don't do this at home!!