suite/hr_holidays_accrual_payroll/views/hr_holidays_views.xml

<?xml version="1.0" encoding="UTF-8" ?>
<odoo>

    <record id="hr_leave_allocation_view_form_manager_payslip" model="ir.ui.view">
        <field name="name">hr.leave.allocation.view.form.manager.payslip</field>
        <field name="model">hr.leave.allocation</field>
        <field name="inherit_id" ref="hr_holidays.hr_leave_allocation_view_form_manager"/>
        <field name="arch" type="xml">
            <xpath expr="//field[@name='interval_number']" position="attributes">
                <attribute name="attrs">{'required': [('accrual', '=', True)], 'invisible': [('interval_unit', '=', 'payslip')]}</attribute>
            </xpath>
            <xpath expr="//field[@name='accrual']" position="after">
                <label for="accrual_limit" attrs="{'invisible': [('accrual', '=', False)]}"/>
                <div>
                    <field name="accrual_limit" class="oe_inline" nolabel="1" attrs="{'invisible': [('accrual', '=', False)]}"/>
                    <span class="ml8" attrs="{'invisible': [('accrual', '=', False)]}">Days</span>
                </div>
            </xpath>
        </field>
    </record>

</odoo>