The Stedi ST1K Series bars will come with either side brackets, sliding brackets or both. Below is a brief run-through on both mounting styles to help you through installation.
Best described using the diagram below, the side brackets should be assembled in order of components: Plastic Washer > Bracket Arm > Washer > Spring Washer > Bolt.
The bracket can be assembled prior to installation. Using the wider opening in the channel of the light bar, insert the bracket and slide to the desired position for mounting. Once the bracket is in position, tighten down the 2 bolts to secure the position in the channel.