Arranging two car seats?!

iL

I have a toddler who is still rear facing and currently her car seat is in the middle of the car. However, we also have another little on the way!

I’m already wondering about car seat placement. Which child should sit in the middle? It would be hard for me to have to drag the infant carrier over the toddler car seat if I was to keep the infant carrier in the center of the car, so I was thinking to keep the carrier behind the driver seat (I’m often on my own and driverside is the easiest)

Also, groceries typically take up both front seat and rear passenger seat, as well as luggage, etc.

We don’t have a trunk as I have a truck with a dog box and farming equipment in the back

Any thought are appreciated!