thanks Bill- 1990 760 turbo-you're correct, it's the mushroom cap that's pushed into the end of the linkage arm - , the opening, fits over a ball on a short linkage arm (not shown in the diagram) that's fastened to the motor linkage....I'll see if i can make something that will replace the push cap ...

"Push on Cap", that connects linkage to motor, is damaged. Freezing temperatures (freezing wipers to windshield) must have really mangled it; usually one only has to push it back into place for the cap to fasten onto the ball on the (short) wiper arm piece. Can this be replaced/repaired/fi...