I agree, coiled cords are goofy. I have never done this, but maybe I will.
chop job time.
if you are a serious keyboard user, you must have junk keyboards collecting dust, or go to a yard sale or thrift store and buy a board just for the PS/2 cord to be cut off (way cheaper than buying something new at a computer store).
it is too bad that the curls are closer to the SDL end, your splice patch will be harder to hide.