I have a 2007 Hyundai Tuscon and I am trying to install a new stereo. I have managed to take out the original but I think there is a mounting bracket in there that won't let me put in the new bracket for my new stereo. I have no idea if it's supposed to stay there or not but it's big enough to not let the new mounting bracket go in and small enough that if I put the new stereo in without the bracket it's too loose. Please help.