You need to inherit the form view of res.partener to make changes on it.

try like this to change that you want in your image,

<record id="view_partner_form_inherited" model="ir.ui.view">
    <field name="name">res.partner.form.inherited</field>
    <field name="model">res.partner</field>
    <field name="inherit_id" ref="base.view_partner_form"/>
    <field name="arch" type="xml">
        <xpath expr="//field[@name='child_ids']/form/sheet/group/group[2]" position="replace">
            <group>
                <!--write your fields here-->
            </group>
        </xpath>
    </field>
</record>