<data priority="50">

    <xpath expr="//div[@id='informations']//div[@name='reference']" position="before">
        <div class="col-2" style="margin-bottom: 10px;">
            <strong>Your contact</strong>
            <div t-field="o.partner_sale_id.name"/>
            <div t-field="o.partner_sale_id.email" style="font-size: 12px;" />
        </div>
    </xpath>

</data>