Odata - how to fetch & view the files attached to parked invoice docs MIR4/MIR7

Hi Experts,

How do I fetch & view the files attached to parked invoices in MIR4/MIR7 using OData service? Files are in PDF/DOC/text format? Approver wishes to view the attachments in front-end Fiori app before approving the document?

Thanks, Saty