I'm replacing the interior door panels on a '67 coupe with a de-luxe interior. The door light lenses are the rectangular type with a red and larger white part. I need to know for sure which way round the bulb holders fit [pointing towards the front /back of the car] and similarly does the white part of the lens face the front /back of the car? I've seen the lenses fitted either way round on different cars but there must surely only be one correct way!! Thanks for any help, Mike.