Identify Leftover Part

I found this on my garage floor after installing the Meso puddle lights. It seemed too far away from the truck to have dropped off. It was near where I tossed the driver's side door mat. Feels like the same rubber material as the mat.
Hope this is the correct forum for this.

 

Outside window trim corner

 

Major solid if you could point out exactly where it goes.

 

https://www.tacomaworld.com/threads...w-what-these-are-from-the-door-panels.490333/

Scroll down

 

Thanks