This constant allows you to change the post type slug of the sc_events post type.
By default the slug is events, resulting in URLs that looks like this: http://yoursite.com/events/event-name, but by using this constant, you can define the slug as anything you want.
Place the following in functions.php or any custom plugin to change the slug of this post type:
define( 'SC_EVENTS_SLUG', 'my-events-slug' );
Note: after doing this, you should resave your permalink structure for the changes to fully take effect.