account-reconcile/account_reconciliation_widget_due_date/views/assets.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <template id="assets_backend" name="account assets" inherit_id="web.assets_backend">
        <xpath expr="." position="inside">
            <script
                type="text/javascript"
                src="/account_reconciliation_widget_due_date/static/src/js/reconciliation_renderer.js"
            />
            <script
                type="text/javascript"
                src="/account_reconciliation_widget_due_date/static/src/js/reconciliation_model.js"
            />
            <script
                type="text/javascript"
                src="/account_reconciliation_widget_due_date/static/src/js/reconciliation_action.js"
            />
        </xpath>
    </template>
</odoo>