partner-contact/crm_employees/views/crm_lead_view.xml

<?xml version="1.0"?>
<openerp>
    <data>

        <record model="ir.ui.view" id="crm_case_form_view_leads_employees">
            <field name="name">CRM - Leads Form with employees</field>
            <field name="model">crm.lead</field>
            <field name="inherit_id" ref="crm.crm_case_form_view_leads"/>
            <field name="arch" type="xml">
                <field name="partner_id" position="before">
                    <field name="employees_range"/>
                    <field name="employees_number"/>
                </field>
            </field>
        </record>

        <record model="ir.ui.view" id="crm_case_form_view_oppor_employees">
            <field name="name">CRM - Leads Form with employees</field>
            <field name="model">crm.lead</field>
            <field name="inherit_id" ref="crm.crm_case_form_view_oppor"/>
            <field name="arch" type="xml">
                <field name="partner_id" position="before">
                    <field name="employees_range"/>
                    <field name="employees_number"/>
                </field>
            </field>
        </record>

    </data>
</openerp>