the straper is slightly different. the WM version doesn't have two levels. bend the rod 90 degree angle then cut to length (be careful not to cut it too short). put the rod through the control horn then put it through the straper. attach the body of the straper to the rod. the keeper in this case would be the small section of fuel tubing.

be careful to cut the tubing cleanly or else it may break in flight. i've had a few times when it did break during flight... luckily, the straper stayed on. check the tubing each time before you fly to make sure they aren't ripping.