Interior rail identification and placement.

That’s the piece I couldn’t identify... I have no clue still as to where I pulled it from on the car. When you say “trap door, do you mean the locking section that divides the trunk from the space between the rear seat? I didn’t remove that piece and only removed the fold down seat back. It’s not in any of my photos I took of the interior... Lesson learned. I need to take better pictures. Lol. It’ll find it’s home, soon enough. I’m not stressing yet, I’m still waiting on a new headliner and sails from legendary and I feel like I’ll figure it out by then. Thank you again.