An alley will take you to a clue about it near the town hall :) but the upgrades are very useful!
If this is that alley then i can't see it, it's just walls. Are the words :"2ob, wake up sheeple" meaning anything then?
You can see the note with the important hint from the place where you find the car, actually! But you might need to go around to get to it.
I did revisit the square few times but it's really just unobvious of what to do there instead of waiting till the scupture becomes alive and follows me
the key is hidden in shivers square, maybe "inside" something
