Hello Daya,
From my understanding, your requirement is:
1. In 'account identification' page, you will add a search field 'order number';
2. Then when click 'search' button, it will get order information including BP number, BP classification and BP name, etc. These information will be displayed in detail screen.
3. Then in detail screen, when click 'confirm' button, the BP information will be displayed in context area part.
Is it ?
For this requirement, normally the search method should be redefined and add the search by order number logics. Or, may I know what is your customizing?
Best Regards, Corrine