How to update XREF2 field in FB02 via batch input?

I would like an example of how to make a batch input in FB02 transaction code by updating the xref2 field?

I tried updating the table directly in the table BKPF.

I need example how make with this change specific field

You could help me have a solution for this.

Thanks for your help.

You can get batch input codes via SAP GUI. Go to System > Service > Batch input > Recorder and start new recording.