how to append additional line for co-product on CO11

Hi Gurus,

My requirement is to append additional line to CO11(production order operation confirmation) goods movement screen for each coproduct assigned to that operation.

Current settings are:

material master co-product indicator checked

BOM item detail(co-product component) co-product indicator checked

backflush indicator is set to 1 (always backflush) in material master

Goods movement details for a coproduct is not coming on the CO11 goods movement screen and my requirement is to append co-product information on the CO11 goods movement screen.

The required include which handles the job right now is LCORUF73

The function module that populates Co11 goods movement screen is CO_WB_MAINTAIN_GOODS_MOVEMENTS

Please suggest how to append additional details to CO11 goods movement screen

Thanks