Business partner SAP internal ID and Business system ID

Hi everybody,

I have a question about SAP internal technical ID and Business system ID.

I would like to use the customer ID for integration with an external system, so when I upload a Customer template, using Migration Cockpit APP, I activate this option at the stage of "Contert values".

And then SAP proposes an SAP Internal Technical ID and offers to input Business system ID.

But when I open the BP record (Maintain business partner APP) or export the BP from SAP (Export Master Data - Business Partners APP) I can´t find any information or any field where Business system ID or SAP Internal technical ID appears.

I´ll be very gratefull if anybody can help me to find where I can see this ID´s in SAP System.

Thank you.