Need to add custom field on Email Assignment Block of Contact Person Overview Page

Hello Friends,

I have a requirement to add custom field on Email Assignment block ( of Work Addresses ) of Contact Person Overview Page.

I have enhanced the Bol Attribute structure CRMST_EMAIL_BUIL and relavant table ADR6 with the Z field.

I also figured out the Genil Class CL_BUPA_IL_CP_ADDRESS to be enhanced to add the logic for saving and retrieving the z field value.

However, i am not aware how to enhance Genil class methods (READ, MODIFY) to add the logic for z field as the MODIFY method is internally using BUPR_CONTP_ADDR_CHANGE bapi to change the email addresses at database level and we have not enhanced the BAPI structures with the z field.

Friends, could you please let me know the approach how to enhance the GENIL class methods so that z field value can be stored and retrieved seamlessly.

Note: AET is not supported for Email assignment block BOL object.