Next-Generation iPhone Dock/Headphone Jack Assembly Paired with Rear Shell

[Grahamwho]

IIRC, they also go through the mounting holes on the dock. So they serve 2 purposes.

In the pictures I'm looking at it looks like the screws on the bottom don't go through the dock, could be wrong tho, who knows. They definitely at least hold the display assembly down though.

 

[Geckotek]

I could easily be wrong on this one.