<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <template id="assets_backend" name="backend" inherit_id="web.assets_backend">
        <xpath expr="." position="inside">  <!-- both back and POS -->
            <script type="text/javascript" src="/pos_backend_communication/static/src/js/common.js"></script>
            <script type="text/javascript" src="/pos_backend_communication/static/src/js/back.js"></script>
            <link rel="stylesheet" href="/pos_backend_communication/static/src/css/pos_backend_communication.css"/>
        </xpath>
    </template>
</odoo>