unless the truck has been repainted and the painter either painted over it or removed it those UL stickers are located on the panel behind where the operator stands probably on the RH side or possibly on the front between the mast and front battery panel or possibly on the LH side of the operator compartment on the drive motor panel. It may be located on the cover on top also. It just all depends on what year it was built, they did have a tendency to put those labels in different spots but they are usually clearly visible. It's usually a small decal/plate a couple inches square or slightly rectangle. If you don't see one look closely at the paint and you may still be able to see the outline of it if they didn't sand it off if the truck has been repainted.