partner-contact/partner_sector/security/partner_sector_security.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    
    <data noupdate="0">

        <record id="group_use_partner_sector_for_person" model="res.groups">
            <field name="name">Use sector for individuals</field>
            <field name="category_id" ref="base.module_category_hidden"/>
        </record>
    </data>
</openerp>