Many suspension parts are preloaded where you can't find the loose joint unless you take off the spring pressure.

That said. Morse code light taps usually either sway links or tops of shocks. It's easy enough to take off one side of a shock to make sure they move smoothly and feel for wiggles.

Sway link should be very difficult to twist buy hand, every failed one i could rotate by hand pretty easy.

I have a similar tap front right on my e70. I didn't see anything in the ball joints so I'm suspecting top of shock tower bearing or mounts.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)