Hey guys, just got my model 3 a couple days ago and have some quick questions. When I was checking the car a bit more closely when I got home, I noticed 4 small plastic rectangular caps/flaps that were open on the underside of the car (2 on each side). I took a pic of it and it looks like it had holes for screw. Are they bolted down for you guys? or I'm not the only one with empty holes? Thanks in advance