Here's the "plugged" hole. I assume this is #3 from the previous diagram.
UPDATE: I manged to bend it into a better fit. It is not especially easy to bend. The material is pliable, but the structural bending on the sides makes it very rigid. I mistakenly tried using pliers and a towel first, but that did more harm than good. If yours is off like mine, I suggest just taking the time to carefully bend with your hands.