Ah-ha! Thanks, I got it off. On the good one (spare), two of the three 'j' fittings came out with it, I have to dig out the third. On the crappy one (bike), one cover tab was broken and jammed in the hole, and the other two 'j' fittings are stuck in the cover. Another winter project.
I took a picture that shows two of the tabs, on the right with the 'j' fitting, and on the left without.
Thanks.