flectra/addons/sale_expense/views/hr_expense_views.xml

<?xml version="1.0" encoding="utf-8"?>
<flectra>
    <record id="hr_expense_form_view_inherit_sale_expense" model="ir.ui.view">
        <field name="name">hr.expense.form.inherit.sale.expense</field>
        <field name="model">hr.expense</field>
        <field name="inherit_id" ref="hr_expense.hr_expense_form_view"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='employee_id']" position="after">
                <field name="sale_order_id" context="{'sale_show_partner_name': True}"/>
            </xpath>
        </field>
    </record>

    <record id="hr_expense_sheet_form_view_inherit_sale_expense" model="ir.ui.view">
        <field name="name">hr.expense.sheet.form.inherit.sale.expense</field>
        <field name="model">hr.expense.sheet</field>
        <field name="inherit_id" ref="hr_expense.view_hr_expense_sheet_form"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='expense_line_ids']/tree/field[@name='name']" position="after">
                <field name="sale_order_id" context="{'sale_show_partner_name': True}"/>
            </xpath>
        </field>
    </record>
</flectra>