Door lock water shedder

[Retroanaconda]

There’s a plastic sheet water shedder type thing that goes around the lock mechanism inside the door, visible in the photo below. Not the main big water shedder that covers the whole door, a much smaller piece.

Does anyone have any info or photos on how it’s supposed to fit? I have the parts but couldn’t figure out how it fits and what it’s supposed to do.

The part is EJD500010, and looks like the below.

[Northwards]

I noticed these on a parts diagram when I was rebuilding my doors. I ordered them, and assume I fitted them (memory’s clearly not what it was!). I’ll have a look to see if I did take any pics. 
 

My thinking is that the ‘whole door’ water shedder is intended to keep water inside the door, where it will drain out of the holes at the bottom. The small one I assumed was intended to protect the lock mechanism, but as I say I can’t remember how I fitted them.

I’ve been in there more recently as I was replacing the door handles, and they did make it more awkward to access all the little clips on the control rods.

Like I say I’ll have a look to see if I took pics, unless someone else jumps in first.