Hook the string up in the tailpiece, lead it to the tuner, then 3 to 5" past the tuner you put a sharp bend into the string, then you cut the string about 0.5" beyond the bend, you hook the bent bit of the string down into the slot that runs down the centre of the tuner shaft, and gently bring the string up to pitch. If the string still unravels, it's just not going to work.