@dadneedsdabs was cool enough to make our instructional video for us. Take note of his dad tips.
-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.