In the main screen of the BCS Connector Designer, select the ellipsis button next to SAP R/3 Connection. The SAP Connection dialog will appear.

BCS-Connection-SAP-01

Specify the following parameters:

Parameter  
Client The SAP client.
Example: 800
Language The logon language for the SAP system.
Example: EN
Username The user for the SAP connection.
Password The password for the SAP connection.
Secure Store ID Optional parameter; used for lookup of SAP credentials in a SharePoint Secure Store Application (for more information, see Configuring Single Sign-On).

Choose one of the following options for connecting to your SAP system:

Option  
Use Single Application Server Choose this option to connect to a single SAP server using an RFC type connection.
Host Name of the SAP server.
System The SAP System Number (00…99).
Use Load Balancing Choose this option if you have SAP load balancing configured in your landscape and want to SAP determine the appropriate server for your connection.
Message Server Name of the SAP Message server.
Group / SID Group and System ID for the SAP Server selection.
Use HTTP / Web Service Choose this option if you have SAP load balancing configured in your landscape and want to SAP determine the appropriate server for your connection.
HTTP-URL Group and System ID for the SAP Server selection.

Use the Test Connection button to validate the connection parameters.

You should see a confirmation message, indicating that the connection to the SAP system was successful. Select OK to close the message.

BCS-Connection-SAP-02

Select OK to complete the configuration of the SAP connection. Notice the status bar at the bottom of your window, indicating that a connection to an SAP system has been configured.