Internal order update with cost center

Hi Experts,

I have requirement to update cost center(ECC  table field: AUFK-KOSTV)in ECC from CRM, after creating service confirmation in CRM, we have this field in BAPIMTCS structure, while debugging i observed costcenter data in import variable of below  ECC BAPI:

BAPI_SERVICECONF_PROXY_UPLOAD.

Here i need a path/area to write the code to  update the field.

Do we have any BADI's associated to this to update the fields.

Please suggest.

Regards,
Nagaraju