pos_multi_currency/web_customization_data.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
    
    <template id="index" inherit_id='point_of_sale.index' name="mom">&lt;!DOCTYPE html&gt;
            <xpath expr="//link[@id='pos-stylesheet']" position="after">
                <link rel="stylesheet" href="/pos_multi_currency/static/src/css/pos.css" />
            </xpath>
        </template>
    
     <template id="assets_frontend" inherit_id="web.assets_common">
          <xpath expr="." position="inside">
			<script type="text/javascript" src="/pos_multi_currency/static/src/js/main.js"/>
			<script type="text/javascript" src="/pos_multi_currency/static/src/js/models.js"/>
			<script type="text/javascript" src="/pos_multi_currency/static/src/js/screens.js"/>
          </xpath>
        </template>
    </data>
</openerp>