How Do I Enter In This Cron?

I have a cron job I need to run and I am using cPanel 10 to do it but I don't really understand how I enter it in exactly, it is asking about how long it will run for and such but I don't know, here is one of the commands if it helps atall:

Will run daily at 12:15 AM:
15 0 * * * GET http://mydomain.com/admin/cron_1215.php > /dev/null

 

I gave an example in this thread
http://forums.digitalpoint.com/showpost.php?p=3878332&postcount=6

 

I don't really get it, I want to know how to enter this:

Will run daily at 12:15 AM:
15 0 * * * GET http://bluenotesolutions.com/orders/admin/cron_1215.php > /dev/null

Into this:



That is what I see in my cPanel

 

minutes: 15
hours: every hours
months: every months
days: every days:
weekdays: every week days

command: php /home/siteuser/www/admin/cron_1215.php

Change siteuser with your ftp user.

it will run every 15 minutes.