I recently purchased a used 2010 Prius. I noticed that there are two holes on the floor in front of the passenger seat. Any idea on what they are for? (I think I attached the picture of the holes.)
If I remember correctly as I popped it off once, there was only a black plastic cover that clipped into the openings. As you can see, it covered nothing of importance. Basically, don't worry about it, lol.
Those holes held a plastic cover plate. That plate filled and covered those holes. Here are some posts about those, though the accompanying image vanished during one of many system upgrades since: Most Obscure Gen III Facts (way out there) | Page 25 | PriusChat
There is supposed to be a black cover that snaps into place. If you lift the carpet flap you'll find the body I D number underneath.