Our 2002 Patriot Thunder did not come with seat belts. It has the slit in the seats but no belts. There were also stickers on the windows stating these seats are not for use while vehicle is in motion. I have had other motorhomes with side facing seats that did have belts, don't know why Beaver decided not to use them. If you decide to put them in, behind the drawer under the couch there are 2 triangle brackets there that look strong enough to hold seat belt hardware. Marty