Honda Accord has cunning system which does have a locater too help you get it sitting right- unfortunately when you're trying to install it you can't see or feel it and it will go in the right way or 180 degrees out. Then the lamps point into the oncoming traffic... Did that once before an MoT - it was so far out they came and asked me what the hell I'd done to it! But did let me change them round rather than failing it.