Im in the middle of putting my new alpine radio in and am using this kit. Anyway, it didnt come with any instructions. I put the faceplace filler in first, followed by the casing. the holes on the side do not line up with the metal wall. So i take it back off and line up the side holes and screw the scews in. now there is a gap at the front where the radio goes in ? Does anyone happen to have the instructions, or can help walk me through it?