Hi Shaheer,
Take a look at this documentation: https://docs.mendix.com/appstore/modules/sap/sap-bapi-connector/
Here you have a full explanation about how to use this connector.
You also have a full section regarding the JCO Destination
You can also check the SAP official Doc: JCo Property Settings | SAP Help Portal
If this answer helped, mark as accept :)
Best Regards,
Ricardo Pereira