Attach the sliders to the brackets using the 5/16" button head cap screws, lock washer and flat washer coming up from the underside of the bracket. Use the square nuts inside the sliders to fasten. There are slots that allow the sliders to be 16 - 16.5" on center in the bracket. We have chosen not to pre-drill holes for other sliders because often customers find the best position for their seat is not centered on the bracket, but offset. You can add your own holes where the sliders would best suit your application. 

The handle comes bent for the 16" on center slider spacing but can easily be bent in a vise to accommodate other widths. Be careful to keep the portions of the handle that clip into the sliders parallel to each other and at a width that keeps spring pressure holding the handle in position.

Use the 5/16" button head cap screw and washer from the top to install the side mounts and seat belt adapters or leveling plates. Attach any belts or buckles to the adapters before installing. Start by installing the bolts in the inside slots first but leave them just loose enough to allow the side mounts to adjust inward and outward. You will need to use a 1/2" wrench inside the sliders to tighten. We've found some 1/2" wrenches that were too wide to fit inside the sliders and others that would. We filed the edges down on some wrenches when we needed to. Install the bolts nearer the outside of the sliders and determine the final positioning with the seat installed. Tighten down all hardware after positioning.