pos_ticket_odontoimagen/template.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <template id="assets_backends_js" name="pos_ticket_odontoimagen assests" inherit_id="web.assets_backend">
            <xpath expr="." position="inside">
               <script type="text/javascript" src="/pos_ticket_odontoimagen/static/src/js/main.js"></script>
               <script type="text/javascript" src="/pos_ticket_odontoimagen/static/src/js/customer.js"></script>
               <script type="text/javascript" src="/pos_ticket_odontoimagen/static/src/js/screen.js"></script>                     
            </xpath>
        </template>
    </data>
</openerp>