partner-contact/partner_label/views/base_config_settings.xml

<?xml version="1.0" encoding="UTF-8"?>
<odoo>
    <record id="view_general_configuration" model="ir.ui.view">
        <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='business_documents']" position="after">
                <div id="partner_labels">
                    <h2>Labels configuration</h2>
                    <div class="row mt16 o_settings_container">
                        <div class="col-12 col-lg-6 o_setting_box">
                            <div class="o_setting_right_pane">
                                
<div class="content-group">
                                    <div class="mt16 row">
                                        <label for="partner_labels_width" class="col-3 col-lg-3 o_light_label"/>
                                        <field name="partner_labels_width" class="oe_inline" />mm
                                    </div>
                                    <div class="mt16 row">
                                        <label for="partner_labels_height" class="col-3 col-lg-3 o_light_label"/>
                                        <field name="partner_labels_height" class="oe_inline" />mm
                                    </div>
                                    <div class="mt16 row">
                                        <label for="partner_labels_padding" class="col-3 col-lg-3 o_light_label"/>
                                        <field name="partner_labels_padding" class="oe_inline" />mm
                                    </div>
                                    <div class="mt16 row">
                                        <label for="partner_labels_paperformat_id" class="col-3 col-lg-3 o_light_label"/>
                                        <field name="partner_labels_paperformat_id" class="oe_inline" />
                                    </div>
                                    <div class="mt16">
                                        <button type="object" name="action_partner_labels_preview" string="Preview" class="oe_link" />
                                    </div>
                                </div>
                            </div>
                        </div>
                        <div class="col-12 col-lg-6 o_setting_box">
                            <div class="o_setting_right_pane">
                                
<div class="content-group">
                                    <div class="mt16 row">
                                        <label for="partner_labels_margin_top" class="col-3 col-lg-3 o_light_label"/>
                                        <field name="partner_labels_margin_top" class="oe_inline" />mm
                                    </div>
                                    <div class="mt16 row">
                                        <label for="partner_labels_margin_bottom" class="col-3 col-lg-3 o_light_label"/>
                                        <field name="partner_labels_margin_bottom" class="oe_inline" />mm
                                    </div>
                                    <div class="mt16 row">
                                        <label for="partner_labels_margin_left" class="col-3 col-lg-3 o_light_label"/>
                                        <field name="partner_labels_margin_left" class="oe_inline" />mm
                                    </div>
                                    <div class="mt16 row">
                                        <label for="partner_labels_margin_right" class="col-3 col-lg-3 o_light_label"/>
                                        <field name="partner_labels_margin_right" class="oe_inline" />mm
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </xpath>
        </field>
    </record>
</odoo>