It shunts all the highs to ground.
Didn't we discuss this before? You were going to remove it from your EB-0L after I mentioned it, then you found out it had already been removed. Or maybe I'm thinking of someone else.
Actually twice! And I forgot about both.
The first time was
in 2018 - that was before I even bought the EB-0L, I just made a suggestion to use a treble-bleed cap in EB's a-la Rickenbacker.
The best easy mod to the stock wiring is to remove the .010 cap which bleeds most of the treble to ground. It doesn't stop the distortion but it helps the frequency response.
The next year I bought the bass, and on March 2019 you wrote
this -
Check the wiring and note the second illustration here. I remove the .01 cap, it shunts highs to ground.
Can't attribute this to long Covid as I never had the virus. I guess I'm just getting old.
BTW that Gibson has become my go-to bass. At home this is the bass I'll play about 80% of the time.