Four wires... did you notice there are 2 rooms to the north with levers, and 2 to the south?
minor <span class='standouttext'>Spoiler : </span><span class='spoiler'>when each lever is pulled, a single word is 'spoken'...</span>
major <span class='standouttext'>Spoiler : </span><span class='spoiler'>Beware.. ..Of.. ..The.. ..Traps - pull levers in the order NW, SW, NE, SE</span>