Preparing 2nd B1 visa interview

Assuming you did not add substantial documentation to your application, I am afraid there is no reason to expect anything different from the interview described in your previous question, B1 visa apply second time!. That is, the most likely outcome is a few questions, followed by a rejection.

The documents are needed during processing of the application. Weight will be given to those aspects of the application that are supported by documents attached to the application.

The interviewer has neither the time nor the facilities for verifying documents. Accepting documents during the interview would make forgeries more effective. During application processing a document can be compared to known good samples, examined by someone familiar with that sort of document, and checked in various ways.

The interview is a combination of a required formality and an opportunity to detect an applicant who had someone else prepare a fictitious application and does not really know what it says. You were not asked for documents during the previous interview because document review is not part of the interview. Attempting to hand the interviewer additional documents with your passport may or may not be considered impolite, but, based on anecdotal evidence in questions here, it is unlikely to persuade the interviewer to review the documents and take them into consideration.

I hope I am wrong, and wish you luck.