In order to access the file manager for your website (and thus, see all of the files and pages associated with it) all you need to do is log into WSP Control Panel and navigate through to your website.
Then, click on File Manager and you'll be able to manage all of your site's files from there.
Then navigate through to the site you wish to access and then go into the wwwroot folder. This is where all of your site's files are stored.