Sap fiori component

Hello Experts,

Frontend server- SAP NetWeaver 740

Backend server - SAP NetWeaver 702

                 SAP ERP 6.0

                 EHP5 FOR SAP ERP 6.0

we are implementing a fiori app for approve purchase order and approve Requisitions , above screen shot is a component installed on frontend and on backend.

Do i need to install SAR## component in backend system?

Kindly help

Amit