The motivation paper is based on a booklet that you SHOULD have been sent by Hr (via a link). I say SHOULD because they didn't send it to me and I know at least one other person who also didn't receive it. The booklet is different from the one you were sent for your stage one.
The interview has nothing to do with the test paper. It is more like a quick fire Hr interview where they expect you to give examples. For instance, 'Are you xxx?' [you would answer yes or no] WHY do you think you're xxx?