This is something that a lot of parents also tend to get wrong. The best place to put the buckle to the 5 point harness is in the center part of their chest. Many parents think that placing it on their stomach is where they should put it, but they would be wrong. In the event of a crash, the ribcage is far stronger that the soft part of the stomach. The key of the 5 point harness for these chairs is how it distributes the force evenly at 5 places so that the impact isn’t concentrated in one section such as the neck or stomach. That’s why it is important to slide the buckle up to the chest when strapping them into place.