She shares more about the safest location for infant carseat in your car: «The rear center seating position is perceived to be the safest from the perspective that it's furthest from lateral impact on either side.» (ph.theasianparent.com)
I'd note that most infant carseats do actually work without the base, even if you use the base most of the time. (havebabywilltravel.com)
Also very easy to use with infant carseat. (albeebaby.com)