Can you ID this Jeep part?

[Bowhunter]

This plastic tailgate looking part came in a box with my TJ when I bought it a few months back.The box had the soft top parts but this looks like it’s part of something else.

Tried google searching TJ tailgate and didn’t find this part. Any ideas?

 

[06lj]

It's the factory trunk option.
https://wranglertjforum.com/threads/factory-rear-trunk.43457/

 

[Bowhunter]

Thank you sir!