I've recently pulled up the carpet in my daughter's bedroom to redecorate. Before I put down laminate, I need to lift the floor to sort out a badly installed cabling. The floor aleady has a few odd shapes which look like cutouts? I have found about five, all of which look like they've been taped in place? Does anyone know what they are? Is this where the floor was cut previously for the dodgy cabling to be installed? Can I reuse them if that's what they are?