BAPI for updating the WBSE Finish Date

Hello Experts,

I am new to SAP Project system Module. I am working on CJ20N Tcode and following is the requirement I am working on currently.

I want to Update WBSE End date , I.E PRTE-PENDE Field . Below is the Screen shot of the Field in the WBSE Header. I need a BAPI through which I can update this (PRTE-PENDE) date field.

Thanks and Regards,

Nikhil Kulkarni