lets see if i can get through this (right hand in cast)
the bottom holes (singles)are for hooks or buttons.
the holes (::)get laced.
start by tying a knot in the end of stretch cord. thread unknotted end into bottom right hole and bring it out the upper left hole.
leave enough for a loop then thread end through upper right hole and across and out of lower left hole. tie knot.
you are left with a loop which is stretched around forearm and placed over hook or button. pulling on the knot end tightens the guard.
if that is unclear i'll try to get a picture