stock-rma/rma/wizards/stock_config_settings.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <data>
        <record id="view_stock_config_settings_rma" model="ir.ui.view">
            <field name="name">stock.config.settings.rma</field>
            <field name="model">stock.config.settings</field>
            <field name="inherit_id" ref="stock.view_stock_config_settings"/>
            <field name="arch" type="xml">
                <xpath expr="//group[@name='shipping']" position="after">
                    <group string="Return Merchandise Authorization">
                        <field name="group_rma_delivery_address" widget="radio"/>
                    </group>
                </xpath>
            </field>
        </record>
    </data>
</odoo>