Below are the 2 commands just replace "your-site"  if it is a sub-domain then add "sub-domain.your-site" after you add then the whole command gets added and also if yours is not a .com then replace that with yours as well..


wget -O /dev/null http://your-site.com/wp-content/plugins/webinar_plugin/webinar-crons/send_email_cron.php



wget -O /dev/null http://your-site.com/wp-content/plugins/webinar_plugin/webinar-crons/get_webinar_notification_cron.php



They need to point to the ewp files within that install to fire off to send out..


use common settings of every 15 minutes of every day of the week month and year