I tried this method several weeks ago with several packages I installed for a neighbor. I removed the can and queen first, then put the top wood piece back on. I then rubber-banded the queen cage to the middle frame. I then opened the side as shown and with one light shake, they all went in. Much easier than shaking them through the "piggy bank" hole or placing the cage inside the brood box.
I will use this method from now on. Very easy for beginners to do as well.