How to make connection from sap mii workbench to sap erp to call bapi/function module

[Former Member]

While configuring the SAP JCO interface configuration to call BAPI , the screen does not show any input for User ID and password to connect to ERP system but it is showing a dropdown as credential alias, if it the same then from where to populate this dropdown.

[Former Member]

I got the credential alias from credential store.
Also able to call one simple function module with one input and one output field
Please guide how to link output with a grid or some other UI element.