digest/views/res_config_settings_views.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <record id="res_config_settings_view_form" model="ir.ui.view">
        <field name="name">res.config.settings.view.form.inherit.digest</field>
        <field name="model">res.config.settings</field>
        <field name="inherit_id" ref="base_setup.res_config_settings_view_form"/>
        <field name="arch" type="xml">
            <xpath expr="//div[@id='contacts_settings']" position="before">
                <div id="statistics" >
                    <block title="Statistics" id='statistics_div'>
                        <setting string="Digest Email" help="Add new users as recipient of a periodic email with key metrics" title="New users are automatically added as recipient of the following digest email." name="digest_email_setting_container">
                            <field name="digest_emails"/>
                            <div class="content-group" invisible="not digest_emails">
                                <div class="mt16">
                                    <label for="digest_id" class="o_light_label mr8"/>
                                    <field name="digest_id" class="oe_inline"/>
                                </div>
                                <div class="mt8">
                                    <button type="action" name="%(digest.digest_digest_action)d" string="Configure Digest Emails" icon="oi-arrow-right" class="btn-link"/>
                                </div>
                            </div>
                        </setting>
                    </block>
                </div>
            </xpath>
        </field>
    </record>
</odoo>