Pass the custom data from CRM to ECC using BDOC

Hi All,

I have created new Z field using AET and i need to replicate the z-field to EC using BDOC into PSSC System

Currently my BDOC in SMW01 has Data in Z fields as well,

I need to pump in the data from CRM to a Z- field in PSSC_SXP Table.

I have added a Z-field using Append structure into the standard table and in the structure(Update ) also in ERP.

But i need a place to pump in the data from Bdoc Structure to the Z-field in ERP.

Can any one pls let me know how do i achieve this and watz the best place to code the same ??

ANy help is highly appreciated !!