2 Babies, Carseat Advice

Kelly • Happily married, teaching, and expecting our second July 2018.

I have a 3 year old and one due any day now. I need advice, is it better to have the new born in the back driver's side and the 3 year old on the passenger side? I'm trying to think of the most convenient and safest set up. I was thinking I could open the driver's side as let my 3 year old hop in and scoot over you the other side (to quickly get in and out of the parking lot) then pop the newborn in the same side. Advice?