69-70 Mustang and Cougar radios support bracket. This bracket is crucial in mounting the radio as the radio is held by this bracket and not the dash. If original back brace is missing, use the back strap provided by Custom Autosound. The back brace is important as it stabilized the radio. Our tech department has received numerous calls from frustrated installers trying to install a radio in a '69 or '70 Mustang or Cougar without this bracket.