I should also mention that the placement of the two new outlets is pretty much not negotiable. On the back side there are plastic ribs in between the outlets. It is easier to add two outlets instead of one in the middle. Another limitation are the two cup holders. They take up a lot of space behind the outlets. Having three outlets won't work for you will be able to install only the center outlet. As it is, my two outlets are a tight fit when considering the electrical connections. I even had to bend the prongs on the back side of the outlets a little towards the middle to get the connections to clear the cups properly.
Center the outlets between cup holders with consideration to the back side plastic ribs and you will do just fine. Deviate from that and you'll will regret it.
