Once you get it tight enough, cut it off about 1/2 inch or a little less from the grip and put a bend in it. Take your pliers and push the tip of the wire into the grip and flatten it out. You want it to penetrate the grip so it will not poke your hand when riding.
I always do mine at the top of the grip, if done on the fronts side or bottom it will tend to work out of the grip and implae your hand