manufacture/mrp_bom_location/views/report_mrpbomstructure.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <template id="report_mrpbomstructure_location"
              inherit_id="mrp.mrp_bom_structure_report">
        <xpath expr="//thead/tr" position="inside">
            <th>Location</th>
        </xpath>
        <xpath expr="//tbody/t/tr[1]" position="inside">
            <td>
                <span t-field="o.location_id.complete_name"/>
            </td>
        </xpath>

        <xpath expr="//tbody/t/tr[2]" position="inside">
            <td>
                <span t-esc="l['location_name']"/>
            </td>
        </xpath>
    </template>
</odoo>