Whistle stop strips help needed!

I acquired these whistle stops a coupe of years ago in the hope they might reduce some of the infamous front door wind noise on our Holdsworth Camper.

Please note: For some reason I can't upload the photobucket link for the photos i'll keep trying?

Only just got round to looking at them properly......I've really no idea how or where they fit? 

They're clearly for the lower part of the door & fitting will obviously require some drilling. They're handed obviously but I don't even know which side is which!?

Do they fit to the door or the  ' a' post?

If anyone has a photo that would be fantastic. The rubber is in good nick  & the retaining strips just need cleaning up & painting or powder coating. (Once I've worked out where they go)!

Oh....and does anyone know if they actually DO reduce wind noise?

Any help would be much appreciated.

Thanks, Howard