Holes on the side & tailgate of bed

Hello,
Does anyone have an idea about these holes on the truck bed?
The small plastic inserted into holes and it's around of bed and Tailgate.
I think the bar-rail can install outside or it has a another purpose that I'm not aware of that!!

2002 Tacoma Pre-Runner

 

Soft tonneau cover?

 

No, I do not think so!!

 

Those holes were there from factory!

 

These holes are not factory, so I was thinking it was for some bedrack/rails but on the body like this, it does not make for a very sturdy attach point, so it must be for something else

truck bed tent maybe? Holding down a tarp/net?

 

Thanks for your reply!
Maybe the Pre-owner used for the "Truck bed tent".
That's good to know that it's not factory holes.
The holes and works seems done in the professional way and seal well with the strong rubber covers...

 

bullet holes

 

You could get some of those super cool bullet hole stickers and throw people for a loop if they ever get close enough to see the hole is real