You can turn your spam box enable and disable from the same page as Spam Assassin. It's just that easy! With the recent upgrades to cPanel, the team has been paying more attention to the users of Spam Assassin.
In the previous build you would need to use an imap client to get to your spam box. Well not anymore. You can create a "new" e-mail account that has precisely the same settings as your e-mail account, but add: "/spam" to the end of the e-mail account user name. This will retrieve only your Spam Box mail.In order for this to be useful, you will want to set up your e-mail client to deliver this Spam Box mail to a special folder (perhaps called spam?) automatically.