there are two brakets, an L and S shape. the L attaches to a piece of metal in front of the passenger taillight that runs parallel to the car and S to a bolt in the top of the trunk sheetmetal. The CD changer slides on and off the side rails of the plate the brackets mount to. I used the braket to install my cap, but it give you an idea and location.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>