Part fell off - what is it?

I found this in my driver's side footwell yesterday. Not sure if it is a shipping thing or some real part that needs to be popped back on? I haven't pulled the underdash panel to look up there yet. Anyone know what this is?

 

Seat Track Cover (Left, Right, Front)
Part Number: 721270C080
Supersession(s): 72127-0C080
SEAT TRACK BRACKET, INNER FRONT RIGHT; SEAT TRACK BRACKET, OUTER FRONT LEFT.

Take a look at the passenger side to see how that one is positioned.

 

Excellent, thanks. I was looking up and should have been looking down. Those things just pop on and off easily. Done that many time on my old Tacoma... these look different but should pop on just as easily.

 

Mine kept popping off too. I guess it gets kicked upon exit? Driver's side. More times than I can count - until I put a screw through it to hold it on. Just a cosmetic piece but it needs a design upgrade.