- Remove the mounting brackets from the box, being careful to not drop the screws.
2. Place U-bolt on the railing, orienting the open portion of the bolt towards you.
3. Slip the bracket over the open end of the U-bolt and tighten the bracket in place
4. Loosely secure the 2nd bracket, use the sensor box itself as a guide to position of 2nd bracket in the correct spot. Then tighten down the second bracket.
5. Screw the box into the bracket as shown above.