REST adapter bulk api update to SFDC

Need help form you. My scenario is SAP PO 7.5 to Sales-force using REST adapter with oauth2.0.

I am able to send data from SAP PO 7.5 to Sales-force using REST adapter with oauth2.0 including PATCH method.

But how can i do Bulk API transmission using REST adapter?. Please guide me to achieve Bulk API data transmission.

Thanks in advance for your help.

Best Regards,

Karunakar A