Mine only came with the one pin on the drivers side by the trunk release. This does absolutely nothing to hold the mat in place. I went back to the dealership and looked at an Sti in the showroom. It had the pin but also had a bracket with a hook for the mat. This mounts to the seat bracket closest to the shifter.
The dealer forgot to install mine. My sales guy gave me a few different brackets to try. It works much better now