Custom fields replication in Equipment BDOC

Hi,

We have used AET to extend the IBase stucture in CRM with a custom field.

We want to replicate Equipment to IBase from ECC to CRM.

This custom field was added by AET to the append structure CI_EEW_IBIB,

but it is not in the BDoc structure for CRM_EQ_DMBDOC.

How do I get the custom field to show up in the BDOC?

How/where do I map the Z Equipment fields to the IBase Z fields?

I suspect I can do it with set types and attributes, but I canu2019t find any information on what is the right way to do it.

In CRM in the BAdI method IF_EX_CRM_EQUI_LOAD~PERFORM_LOAD, I think some manipulation can be done.

But if I add my fields using AET, they are not added to CRMT_EQUI_DMBDOC, which is accessible in the BAdI.

Thanks in advance.

Hanlie