<odoo>

    <record id="view_sale_order_form_inherit" model="ir.ui.view">
        <field name="name">inherit.view.sale.order.form</field>
        <field name="model">sale.order</field>
        <field name="inherit_id" ref="sale.view_order_form"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='sale_order_template_id']" position="after">
                <field name="credit_limit"/>
                <field name="customer_balance"/>
            </xpath>
        </field>
    </record>
</odoo>