Hi there, well it is basically that u put the front strap into the second insert hole from the front, on both inside and outside plugs. And the back strap the second insert hole from the back on both plugs.
if you prefer a more narrow stance, then move the back strap to the second hole from the front.
you can also adjust the width of the straps by turning the plastic foostrap insert around as it is assymetrical, so that the distance is narrower if u have smaller feet.
hope that is clear enough?