Windshield wiper nozzle spray pattern adjustment

You mean the actual head (red) of the nozzle that the hole is in right? Or the steel balls that are in the elbow (blue) of the nozzle? (The blue circled area has a ball bearing in there. ANd I could not figure out what it was for.)

I didn't realize either were adjustable? I'm assuming it's the red circled nozzle that is adjustable. SO just stick a pin in there say a couple mm and turn them to the angle you need? Higher and the two more spread out would be a GREAT improvement.

View attachment 73794
Yes, the red area.
 
The balls rotate in the plastic housings. They might take a little working to break them free if they've been in that position for a long time. Once you do that, they rotate fairly easily.