You use 4 holes on both sides of the board. I would suggest you mount them, or at least place them in the centered positions for both. This is normally good for alot of people. If u like your feet wider than that, move the bindings over one pair of holes to the tail on the rear foot and one pair of holes to the nose of the lead foot. Opposite if you want it narrower. I wouldn't place the bindings in unsymmetrical holes (like for example: back foot 3 holes from the tail, front foot 1 hole from the nose).