Okay, I got mine installed today.
The good news: It was completely free. It probably works. I have to find the tether attachment for the car seat, since I removed it.
How it installs: It installs with one bolt and locknut, and a steel reinforcing plate. If you poke your head into the trunk and look at the underside of the rear deck, there are some round an square holes. The plate has a notch that fits into one of the square holes, and the bolt goes through the round hole. They must cut a hole in your carpeted deck between the speakers for the anchor to install. It sticks up maybe an inch above the rear deck and then it has a metal tab sticking out of the top of it. The metal tab is rectangular with an oval hole in it for the tether hook.
The bad news: It looks really really bad. I will be creating some sort of a little housing cover to go over it, that will be carpeted, because with all the nice curvy flowing lines of a Bonneville, this looks like some unfinished piece of machinery sticking up in the middle of the rear deck.
I would have vastly preferred it to be closer to the back of the seat, like where the headrest of the seat meets the rear deck. But that'* not how it installs. I *will* take a photo to post here, but my camera was full.
Even looking bad, these are nice to have, to keep your kid'* seat from rocking around during turns, especially if you have leather seats. I have cloth, but even then a tall seat can rock back and forth. I'll be happy to tether the seat down. But I will definitely be making a housing for it.
97 SE, teflon wiper blades, Dunlop Sport A-2 tires, Leather steering wheel cover, Pioneer DEH-P480MP mp3 CDRW head unit, Pioneer 12-disc changer, iPod hookup, Boston Acoustic 3 way 6x9'*, Boston acoustic separates in door pods, Alpine 4 channel amp in trunk. Magnaflow dual outlet muffler and Ractive stainless tips. Autozone rice pipe and K&N 4750 intake kit. Clear corner lights. Energy Suspension end links.