Update Certificate number in SAP EWM

Hello Folks,

I am using the function module /SCWM/STOCK_CHANGE to achieve the functionality of tcode /SCWM/POST. So as to change stock from blocked state(B6) to unrestricted state(F2) or vice versa. And it is working fine. The only thing is how to update certificate number. Because there is no field in tcode /SCWM/POST. I want to update certificate number which is visible in /SCWM/MON-->Physical stock-->Enter material number