Welcome to the forum Larry. We have a few members that own 97 and above PA'*.
Unfortunately I have not replaced my rear speakers. I will try to get another members input to better help you as well, so hang in there.
The factory manual is letting me down on rear speaker'* info on removal.
There must be an omission or the recommend 8C section is MIA...go figure.
Here is a diagram that locates the drivers side speaker, but I don't see a cage there.
Does this help at all?
Any way to take a photo of what cage is in the way?