Interesting (to me, at least) find in the instructions for 42115, page 244, step 367. In my book (left) there's a black pin snuck in, that shouldn't be there. It has been
42115 Lamborghini Sián FKP 37 LEGO® Technic Manual at the Brickmanuals Instruction Archive - YouTube
Light My Bricks LEGO® Lamborghini Sian FKP 37 set 42115 Light Kit Installation Guide