I just bought and installed the top boot kit for my '15 Those straps should have come with snaps for you to install. The male part of the snap screws into the wood frame at the bottom of the seat back (you need to take the seat bottom out to access this. The kit has a little driver and die to instal the female part of the snap on the strap once you've positioned the male part, and determined the correct length for the strap.