Where does this piece go?

I everyone. In an attempt to rectify a door check that keeps bending the window track (2 door checks now). I have taken my driver side door apart several times.
The last time I put it back together I left this rubber piece out by mistake and I am not sure exactly where it goes.

Any help with this would be much appreciated!
Thank you in advance

 

Rear top of the front door card. I'll try to find a pic. You cab probably see it on the top of the other door.

 

Saved this picture from the forum for the same reason.

 

You maffers are amazing!

 

You see that Tacomaworld. OP asked a question and two members helped him out with the correct answers.

 

Got it! Fits perfectly and makes sense now. Thank you for the response!

 

What brand of 0W20 do you use?

Hehehehe. Kidding kidding.

 

i just did the same thing when installing the kicker upgrade speakers