Alvin, just my 2 cents, but DON'T DO IT! Try this, sit in the driver's seat and have someone hold your radio/CD player where it would go. Can you fiddle with your radio and safely drive? Can you SEE the face of the radio? They make me feel closed in, but that's just me. If all you want is lights, Subaru has a beautiful gismo about the size of a soup bowl that back mounts that contains lights and switches. Sorry to muddy the waters!
Les