CComment docs
JEvents – com_jevents (Pro feature)
First you need to download the plugin “compojoomCommentJevents” from the download section at Compojoom. Then install it as a normal Joomla plugin and enable it. After that go to components->compojoomComment->settings click on new, from the component dropdown field select com_jevents and click save – now in front end under jevents entries you should see the CompojoomComment form for comments.