Couple of u-bolts some washers, nuts, extra long nuts, wing nuts and thick hose. Keeps it dry and clean, and easy access. 3 of 4 nuts are just finger tight wing nuts and one long one you need a wrench, just to slow down anyone wanting to steal it. Rubber hose is thread over the u bolts to create some grip, it looks like it is sitting on seat belt covers but is actually not supported by these at all. Its solid as a rock doesn`t bounce around, hinder the seat and is actually a good tie down point. Actually used same principle for a shovel mount on center roll bar. Cheapest most practical mod you can do.