Minimum requirement for the operation of the integration between PARTsolutions and SAP ECTR is a version >=4.8 on the part of SAP ECTR.
The SAP server version doesn't matter for the PARTsolutions integration, as the communication takes place via ECTR.
You install the PDM integration as part of the PARTsolutions Enterprise Setup in the Product Features > PDM Integrations > SAP dialog box.