I don't have pics of mine but the topper extends 2 inches on either side. The instructions say a minimum of 2 inches longer than your slideout. My brackets extend past the flanges of the slideout. It sounds that they did not put the right one on your rig.
Richard & Jill
2014 Flagstaff 832IKBS Classic Super Lite
2018 Silverado 1500 Crew Cab Z71 4WD All Star Edition
Camping since 1989
Car Shredder Op/Tech, Scrap Metal Recycling - retired
I deserve hazard pay when camping with my relatives.