EDI 834 - Mapping for fields in structure format

Helloo All,

I have a scenario to generate an EDI file( 834). Each fields are separated by colon :

INS06 has to be populated with ABC. As the INS06 is a structure with each fields of 1 digit max length, we are populating D_1210 = A , D_1701 = B , D_1701_2 = C.

I want the data as INS:B:12:XYZ:30:2:ABC

But it is coming as INS:B:12:XYZ:30:2:A:B:C because INS06 is of 4 fields and is separated each filed with : .

Please help how to populate without field separator for INS06.

Regards,

Tibin