I had a look tonight and Blade's description is close to my L322, which is older than his. On mine there are two plastic type hooks (in comparison to Blades pic, I only have the two vertical hooks) attached to the top of the lower trim that hook into the bottom lip of the upper trim. One of hooks is broken. I think Blade is right about pulling out at least the bottom of the upper trim, as I can't even extract the broken top half of one hook. It's stuck to the upper trim panel.

