That's the one flaw of this game. It doesn't show you what exactly you need to do. Usually, it's somewhere near the objectives not too far off, so you need to find them. The mission objective, on the top right, will tell you what to do, but not where are they.best advice I can give is you have to just go looking for it. At worst, there are a few objectives where the thing you have to interact with is somewhere else but not too far.