Adding seat belts to a class A?

I have actually done this in coordination with the coach manufacturer. They sent me the additional seat belts for installation. The coach came with only one belt per direction in the dinette however the dinette has room for 4 people. I did not need to remove the table. The couch has only two belts but room for 3 people. I used steel frame attachment brackets to allow the installation of the second seat belt at the dinette. The existing carriage bolts are completely through the floor and into the structure underneath the motorhome. The critical thing if you are adding new belts where there is no existing attachment point then you will want to plan for the placement of the attachment bolt. I suggest you use grade 8 bolts, washers, and nuts. If you are attaching to the floor decking you will want to drill through the floor and use a large carriage bolt and put a large fender washer on the bottom and the top as well as use a nut on the top to secure the bolt to the floor and a separate nut to secure the seat belt to the nut. Depending on your application and location you may wish to have a steel bracket fabricated (I used steel brackets I had around my shop.) to hold the end of the seatbelt. I worked carefully with the OEM representative and emailed them photos of my installation and design. Ultimately, your family is safer in a motorhome vs a car the seatbelt just keeps them in one location if an accident occurs or if sudden braking is required. If you like I can post pictures of my installation.