User exit for copy in contract

Dear all,

Please help me with issue

Create the  contract for  material X which has components A and B ( in cs01 create material X and add components A and B).

With help  enhancement is filled the  field VBAP-ZZG_PCLOT but only for main item X, but we need that to be filled for all items ( A and B).

Is there any user-exit or something else  allowing copy some data from main material to its components in while creating and changing contract?

Perhaps it can do by standard?

Help please

I look forward to reply

Thank you in advance