car seat positions for toddler and newborn

Emily • Wife to an amazing man 1/16/12... Mommy to a beautiful boy born 9/15/12... Waiting on our little girl due 6/17/15!
Help! I have an almost 3 year old (34 lbs) and I'm due in 2 weeks with baby #2. We own a Ford Edge and I am completely confused as to where I should place the children. I assume the toddler behind the driver seat and the newborn in the center? Any moms out there have any input? TIA!