account-reconcile/account_statement_base_completion/statement_view.xml

<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>

    <record id="bank_statement_view_form" model="ir.ui.view">
         <field name="name">account_bank_statement_import_base.bank_statement.view_form</field>
         <field name="model">account.bank.statement</field>
         <field name="inherit_id" ref="account.view_bank_statement_form" />
         <field eval="16" name="priority"/>
         <field name="type">form</field>
         <field name="arch" type="xml">
             <data>
                 <xpath expr="/form/notebook/page/field[@name='line_ids']/form/field[@name='ref']" position="after">
                     <!-- <field name="partner_name" />
                                         <field name="order_ref" />
                                         <field name="email_address" /> -->
                     <field name="label" />
                 </xpath>

                 <xpath expr="/form/group[2]" position="attributes">
                     <attribute name="col">10</attribute>
                 </xpath>

                 <xpath expr="/form/group/field[@name='balance_end']" position="after">
                     <button name="button_auto_completion" string="Auto Completion" type="object" colspan="1"/>
                 </xpath>

             </data>
         </field>
     </record>

    
</data>
</openerp>