Bidder creation via program

Hello All,

BAPI_BUPA_CREATE_FROM_DATA - created a contact person and generate BP ID

BAPI_BUPA_ROLE_ADD - assigned Contact person Role (bup001)

and i want to integrate this contact person to SRM vendor organisation structure so that this person ill become a BIDDER

Please suggest the function module so that this contact person  will be linked to Vendor org structure .

Thanks

Muthu