@zachlee47 - confirmed after installing mine and skimming through the Quick-Start guide (page 2), the laser sensor is on the back of the unit under the handle - so you would be fine covering the display. I assume this is why they ask for 20 inches of clearance around the unit so the laser has enough area to scan.
I liked your cardboard suggestion but found 3M Temflex friction tape laying around, which doesn’t look terrible and easy to remove with no residue. Better than no dimmer or having to use night mode!
