Ah, got it. Thanks guys.
I was replacing one of the black trim pieces ahead of the side panels that had a slight scuff mark. Since the parts list calls them “air cleaner covers”, figured there would be air cleaner access under them. Didn’t think to pop off one of the painted side covers but will do so. Swapped the black black piece a few minutes before I had to get to the airport, so no time to get the manual out and figured I’d deal with it when I got back home.
No mice in my garage, but now that it’s summer, maybe lizards.