Thank you for your responses, but I'm looking for something more specific. I found this in the frequently asked questions section you directed me to:
"How long are the logs stored on the server?
Archived logs are not automatically deleted by default. However, you can choose when to manually or automatically (e.g., cron job) delete logs according to your own legal and regulatory requirements.
" , but I don't see an indication of how to do it, commands, or anything that needs to be configured in the ossec file.