Where to configure S3 backups for Pterodactyl?

All of the tutorials I find (and on their documentation) say it's in the /var/www/pterodactyl .env file and says to look for something similar
# Sets your panel to use s3 for backups
APP_BACKUP_DRIVER=s3

# Info to actually use s3
AWS_DEFAULT_REGION=
AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
AWS_BACKUPS_BUCKET=
AWS_ENDPOINT=
however, I see nothing like this in my .env file. Do I just add these to the file? I'm confused lol.
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