SEPA_CT - DME structure

Hello gurus,

I have a SEPA question.

I'm using DMEE for SEPA_CT and need to insert a new field in XML. This new field should be concatenate of  2 fields from Structure FPAYHX - ZBNKL_EXT and ZBNKN_EXT ( Bank Key and Bank Account from vendor). 

There's a way to do this?

Thank's in advance

JoãoPereira