Thanks for trying out the plugin! This plugin is merely a wrapper for the core functions, so you can do it the exact same way. The arguments for the Super_Custom_Post_Type construct are (post type, singular label, plural label, arguments for register_post_type). Let's say you're registering a post type for cars, you would register it like this:
$cars = new Super_Custom_Post_Type( 'car', 'Car', 'Cars', array( 'supports' => array( 'title', 'author', 'thumbnail', 'excerpt', 'comments' ) );
You can read more in the documentation.