What is this part?

[Deepseaskateboard]

I found this plastic thing under my passenger seat.

Not even sure if it is a car part? I can’t see a number on it.

Any ideas?

 

[Nash3vans]

Thinks it fits on the front or rear of the slider mechanism, near where it bolts to floor.

 

[Deepseaskateboard]

Thinks it fits on the front or rear of the slider mechanism, near where it bolts to floor.

Thanks!!

Just clipped it back on.
So obvious now.

It has been off for like two years!