-Your couplers arrived in the fully open position. You should always have the coupler in this position when assembling and disassembling.

-Place the coupler over the bottom piece of glass with the lever in your right hand and the Prism logo facing towards you (flip if left handed)

-Place the next piece of glass in the top section of the coupler

-Place your left hand around the coupler, and your right palm on the lever with your fingers on the grip that sticks out of the circular shaped coupler

-Hold tight with the left hand and push while using the finger grips to close the clamp. 

-This should take some effort, but this tight grip is needed.

-Once the lever starts to move it becomes much easier. 

-You’ll soon be a pro.