Hmmm... It's the same as fitting a regular peep. (Which I just described here: http://www.huntingnet.com/forum/tm.aspx?m=2615303) The tubing gets cut to a length so that there is very little tension on it; cut it to the same length as the distance from the peep to the cable at full draw and then tie a hitch in the tubing to the cable and you should have enough tension to get it to rotate the peep, the less tension on it the better.