manufacture/mrp_sale_info/views/mrp_workorder.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <record id="mrp_production_workorder_tree_view_inherit" model="ir.ui.view">
        <field name="name">MRP Work Order Tree with Sale Order</field>
        <field name="model">mrp.workorder</field>
        <field name="inherit_id" ref="mrp.mrp_production_workorder_tree_view_inherit" />
        <field name="arch" type="xml">
            <field name="date_planned_start" position="after">
                <field name="sale_id" />
                <field name="partner_id" />
                <field name="commitment_date" />
            </field>
        </field>
    </record>
    <record id="mrp_production_workorder_form_view_inherit" model="ir.ui.view">
        <field name="name">MRP Work Order Form with Sale Order</field>
        <field name="model">mrp.workorder</field>
        <field name="inherit_id" ref="mrp.mrp_production_workorder_form_view_inherit" />
        <field name="arch" type="xml">
            <field name="production_id" position="after">
                <field name="sale_id" />
                <field name="partner_id" />
                <field name="commitment_date" />
            </field>
        </field>
    </record>
</odoo>