Using BAPI to create contract in backend.

We are using SRM4.0 and backend R/3 4.7. We are using the extended classic scenario and have to create the contracts both in SRM and backend.

We need to use the BAPI FM BAPI_CONTRACT_CREATEFROMDATA to create the contracts in R/3. But I'm facing a difficulty in calling this BAPI.

Please could you advise what are the mandatory parameters. Please could you tell me what should be the value for ORDER_HEADER_IN-DOC_TYPE, ORDER_HEADER_IN-SALES_ORG, ORDER_HEADER_IN-DISTR_CHAN, ORDER_HEADER_IN-DIVISION?

Thanks in advance,

Anish Cherian