Rear floor mats

I have 2015 double cab Tacoma tss and I noticed the rear floor mats have snaps on them but they do t snap to anything...am I missing something?

 

My '13 has snaps on the riser near the seat bottom that the mats snap to.

 

I don't see anything in my truck, maybe a pic? The snaps are on the mat so I'm thinking they have to serve a purpose of some sort but don't know what.

 

There should be a small plastic finger that is connected to the floor with the other end of the snap on it. This cannot be removed, only cut off. You're not normal, did you buy it new?

 

I had a 2014 DCSB that just got totaled... Replaced it with a 2015. The 2014 rear mats were secured by a snap on a strap attached at the base of the seat. The 2015 has no strap, I'm happy they're gone.

 

Yea bought mine brand spanking new my kats have snaps and nothing on floor. The front ones have twist locks the rear has snaps but nothing to snap them to