Hi,

   I didn't understand the language anyway i think you need to bring that field under sales settings,if so

<record id="res_config_settings_view_form_frequent" model="ir.ui.view">
    <field name="name">res.config.settings.view.form.inherit.sale.frequent</field>
    <field name="model">res.config.settings</field>
    <field name="priority" eval="10"/>
    <field name="inherit_id" ref="sale.res_config_settings_view_form" />
    <field name="arch" type="xml">
        <xpath expr="//div[@data-key='sale_management']/div" position="after">             
                    <div class="row mt16 o_settings_container">
                        <div class="col-xs-12 col-md-6 o_setting_box">
                             <div class="o_setting_right_pane">                                
                                <group>                                   
                                <field name="field name"/>
                               
                                </group>
                            </div>
                        </div>
                </div>
            </xpath>
    </field>
</record>