Dell Latitude Rugged 5430 Dock Adapter

I have a Dell Latitude Rugged 5430 laptop that connects to the Dell K12A “dock” but physically doesn't quite fit. The connector is the same, but the dock is too long to support the front of the laptop or index into the retention holes. This is a super simple adapter that fits tightly over the front cleats of the dock and provides a riser so the laptop fits properly on the dock connector.

In the picture I printed it with no top or bottom layers for speed and economy, but that's optional.