car body, one end of the flat bar is secured to one of the lower tabs and the after the power unit is mounted bend it so it can be secured so the lower section of the power unit is secure, which ever way works best for your model car. this when done should be similar to how the factory bracket was mounted.
3. if you have a power unit that has a relay or control box it stays with the old power unit and is not used with this new power antenna. at the plug that plugs into either the power unit or that plugged into the relay or control 