From what I have seen of these it looks like the pole will fit under the gunnel to keep the pole from sliding toward the top of the boat. Then a line is attached to the end of the pole and the forward crossbar. Then you just stand or hang on teh end of the pole. The pole moves your CG far enough out so you have more righting moment.
Do a search on the catsailor.com forum on this subject. One of the inventors of the easy right has discussed this.
'74 Pearson 30
Previous boats owned
'82 H18 Magnum
St. Louis, MO