Sending shopping cart no from SRM to ECC while creating PO in ECC from SRM

Hi all,

I have a requirement where in i need to enhance the custom screen of PO. In this custom screen there is a field called shopping cart number.

So when a PO is created in SRM the shopping cart has to be copied into this custom field of ECC.

i got to know that BBP_CREATE_BE_PO_NEW is to be used.

So please enlighten me on how to implement this badi?

Thanks and Regards

Veda