Just bought a 2008 SLE and today I found a square piece of the floor between the 1st and 2nd rows (left side, right in front of the bench seat) is possibly hollow and covered by a carpet like material. All other part of the floor is hard plastic. So when I step on this square part, I feel the floor is soft. Does anyone know what this is? Not sure if I could damage something under the the soft cover if I step on it.