These line are in the root crontab. You can edit them with
Dont change that line as it might cause problems with other jobs in ispconfig, e.g. statistics can fail if you change the time. This job is not just the backup job, its the cronjon´b for all ispconfig daily cron activities. ISPConfig takes care that the backup jobs are run at the end of all other daily jobs in ispconfig so that they dont collide with any other job in ispconfig.