Do what is safest. It's not about showing cars you have a right to be in a lane or you should be treated equally. Getting to your destination without getting injured or killed is the ultimate goal here.

Your diagram provides so little information (number of lanes, lights, signs, traffic pattern, vehicle speeds, etc.) that any advice should be taken with a huge grain of salt. What do other bikes at intersection do, if any? Actual pictures or google map links would help.