How can I modify CyberPanel main cron job

I noticed that my VPS CPU always jumps from below 50% to 150% at mid-day every day. I checked the CyberPanel Main log and discovered that CyberPanel is checking to renew SSL for all domains. How can I adjust this cron job, at least the timing to midnight?

What are the specs of the server?

Linode 2 cores CPU 4G RAM

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Is there is a backup set up on your server?

sudo nano /etc/crontab/

Use this command and change the cronjob as required.

It created a new file, nothing to edit. Empty. Ubuntu 20.04

Sorry, the command is sudo nano /etc/crontab

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