Touching the wires together (you actually short them, with a paper clip of something) only works if you are trying to turn the PSU on without it being connected to the motherboard (I'm pretty sure...)
@OP: You can turn on your PC with a screw driver, if you wanted to. All you have to do is find the two pins on your motherboard that correspond to Power On, and use a screw driver to bridge the two. Works like a charm
As for twisting the wires onto the pins, theoretically that would work, but good luck trying to do that... I would think that would be pretty difficult to do, because the pins are so small.