view_pos_config.xml

<?xml version="1.0" encoding="UTF-8"?>

<openerp>

    <record id="view_pos_config_form" model="ir.ui.view">
        <field name="model">pos.config</field>
        <field name="inherit_id" ref="point_of_sale.view_pos_config_form"/>
        <field name="arch" type="xml">
            <field name="journal_ids" position="after">
                <group string="Caisse Alimentaire Commune">
                    <field name="enable_mona"/>
                </group>
            </field>
        </field>
    </record>

</openerp>