partner-contact/partner_deduplicate_acl/views/base_partner_merge_view.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- © 2016 Tecnativa S.L. - Jairo Llopis
     © 2016 Tecnativa S.L. - Vicent Cubells
     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html). -->
<odoo>
        <menuitem id='root_menu' name='Tools' parent='base.menu_base_partner' sequence="25"/>
        <menuitem id='partner_merge_automatic_menu'
            action='crm.action_partner_deduplicate'
            groups='base.group_system'
            parent='root_menu' />
</odoo>