V.H.
I put my twins behind each seat and kept the middle free as it was easier to reach and strap them in like that.They also could not get at each other and fight! Also the seat belt in the middle was only a lap belt not an over the shoulder type and I thought they would also be shielded better in an accident. Using the middle seat in the event of a rear collision the baby could get bumped between the front seats and out the windshield..
This arrangement worked for me and now they are 8 and in boosters they still sit either side