<odoo>
    <record id="sales_po_res_partner_custom" model="ir.ui.view">
        <field name="name">res.partner.sales.po.custom</field>
        <field name="model">res.partner</field>
        <field name="inherit_id" ref="base.view_partner_form" />
        <field name="arch" type="xml">
            <group name="sale" position="inside">
                <field name="customer_need_po" />
                <field name="sale_doc" />
            </group>
        </field>
    </record>
</odoo>
