pos/pos_quick_logout/views/pos_config_view.xml

<odoo>
    <record id="view_pos_config_view_form_quick_logout" model="ir.ui.view">
        <field name="name">pos.config.form.quick.logout</field>
        <field name="model">pos.config</field>
        <field name="inherit_id" ref="point_of_sale.view_pos_config_form"/>
        <field name="priority" eval="30"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='iface_big_scrollbars']" position="after">
                <field name="logout_timeout"/>
            </xpath>
        </field>
    </record>
</odoo>