It's pretty easy when you find how to do it... I found that video that visually helped me... (http://eurostream.ca/FR/ez_conx_supplyline.asp) if you look into that "easy connector" you'll see a small piece of transparent plastic that the copper can fit into it... but that piece should be removed from manufacturer because it is not needed. So, you have to remove the piece of plastic using a little knife if you want to push it like on the video. As soon as you remove that and you push it enough, you will finally heard that little "click"... So that means that it is on place.

Good luck

You should hear a click when the snap lock engages.I agree old school was better threaded was a little harder but it was so much easier to fix.