pos/pos_multiple_control/views/view_pos_config.xml

<?xml version="1.0"?>
<!--
Copyright (C) 2019 - Today: GRAP (http://www.grap.coop)
@author Quentin DUPONT (quentin.dupont@grap.coop)
License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html)
-->

<odoo>

    <record id="view_pos_config_form" model="ir.ui.view">
        <field name="model">pos.config</field>
        <field name="inherit_id" ref="point_of_sale.pos_config_view_form"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='iface_precompute_cash']/../.." position="after">
                <div class="col-12 col-lg-6 o_setting_box">
                    <div class="o_setting_right_pane">
                        <label for="autosolve_pos_move_reason"/>
                        <field name="autosolve_pos_move_reason"/>
                    </div>
                </div>
                <div class="col-12 col-lg-6 o_setting_box">
                    <div class="o_setting_right_pane">
                        <label for="autosolve_limit"/>
                        <div class="text-muted">
                            Limit to display autosolve button
                        </div>
                        <field name="autosolve_limit"/>
                    </div>
                </div>
            </xpath>
        </field>
    </record>

    <record id="view_pos_config_kanban" model="ir.ui.view">
        <field name="model">pos.config</field>
        <field name="inherit_id" ref="point_of_sale.view_pos_config_kanban"/>
        <field name="arch" type="xml">
            <xpath expr="//button[@name='open_existing_session_cb']" position="after">
                <button t-if="_.contains(['closing_control'], record.current_session_state.raw_value)" class="btn btn-primary" name="open_new_session" type="object">New Session</button>
            </xpath>
        </field>
    </record>


</odoo>