I'm putting on new Legendary seat covers on my Cuda. I can't figure out how to attach the bottom of the front seat back cover. On the old one the two ends of the bottom just butt together and where hog ringed. The new cover has this hard plastic on one side and the seam on the other but I can't figure out how to hog ring them together. Anyone out there done this and can tell me how?

Thanks,
Howard