Does anybody know how the rear speaker cover/enclosure attach ? I installed a correct speaker in the middle of rear tray and cannot figure out how to put this thing in there. Am I missing retainers or some hardware/ Thanks.

I think it does require a type of retainer. I was casually going through both the Year One book and the OPG book when I wondered the same thing, and I came across something referred to as a "retainer"..if im not mistaken.

I cant remember if it was in the Year One book or OPG though.

National Parts Depot (NPD) sells them, page 14 in their catalog. It seems to be a metal strap that clips onto the magnet of the speaker, it has a hole in the middle of it for a bolt that would pertrudes through the bottom of the speaker cover.

Thanks for the replies. I will be ordering from NPD