Quote Originally Posted by Dick61 View Post
How do you tell which side is which? The one I have here, if I lay it down so the backside is up there is a cutout about 50mm from the top and the cutout is on the left. If it were on the passenger side, the cutout would be towards the rear of the car when mounted or towards the front on the drivers side.
Lay the trim down flat with the "open" end pointing away from you and the finished side up.

There is a curved point on the end closest to you. The larger radius of the point goes towards the rear of the vehicle on each side.

Refer tup's pic of the bottom of the left pillar trim: