ECC data to AET table of BP(BUPA_MAIN)

Hi ,

I have to replicate the some z fields of customer data(XD02) into AET table of BUPA_MAIN.

I am able to do the fields to fields mapping from ECC to CRM by using the BTE(DE_OUT) .

How Can transfer the data from ECC customer fields or standard fields to AET table of BP.

any idea much appreciated and helpful.

Regards,ram