Unprocessed sales from SAP MIM to SAP FMS

Through this RFC /POSDW/UNPROC_SALES_QUERY_RFC you can communicate with SAP MIM and Inventory Management SAP FMS information on unprocessed sales, which are in the table / POSDW / TLOGUS SAP CAR where sales are recorded with satisfactory outcomes but which are not automatically uploaded to SAP FMS. How can I proceed to the activation of RFC so that this automatic link between the two systems working properly?