The easiest way to configure cpanel backup is through whm. After configuring backup, login to the server through ssh as root. Edit crontab using crontab -e from the shell. You can see an entry 0 1 * * * /scripts/cpbackup .
Change it to 0 10 * * * /scripts/cpbackup. This will make the cpanel backup run
every day at 10 AM . I hope this will help you.