July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
High Mounted Stop Light Assembly: Installation
WARNING: This page is about a different car, the 2007 Lexus ES 350. However, it is still accessible from the selected car via links, so may be relevant.
INSTALL CENTER STOP LIGHT SET
Connect the connector.
Engage the 7 claws and install the center stop light set as shown in the illustration.