How can you add a route for normal requests in the TYPO3 backend? (1)

• By extending the array $GLOBALS['TYPO3_CONF_VARS']['BE']['Routes']

• By extending the array $GLOBALS['ROUTES']

• By implementing the file Configuration/Backend/Routes.php

• By implementing the file Configuration/Backend/AjaxRoutes.php

• By editing the site configuration YAML file