server-tools/auto_backup/data/ir_cron.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo noupdate="1">

    <record id="ir_cron_backup_scheduler_0" model="ir.cron">
        <field name="name">Backup Scheduler</field>
        <field name="user_id" ref="base.user_root" />
        <field name="interval_number">1</field>
        <field name="interval_type">days</field>
        <field name="numbercall">-1</field>
        <field name="nextcall" eval="(datetime.now() + timedelta(days=1)).strftime('%Y-%m-%d 03:00:00')"/>
        <field name="model_id" ref="model_db_backup"/>
        <field name="state">code</field>
        <field name="code">model.action_backup_all()</field>
    </record>

</odoo>