server-ux/sequence_check_digit/views/sequence_views.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
     <record id="sequence_view" model="ir.ui.view">
        <field name="model">ir.sequence</field>
        <field name="inherit_id" ref="base.sequence_view"/>
        <field name="arch" type="xml">
            <field name="implementation" position="after">
                <field name="check_digit_formula"/>
            </field>
        </field>
     </record>
</odoo>