There is an opening in the skidplate below the oil drain bolt. You can get a wrench in there no problem, just a shorter stroke if you will. The problem some folks have had in the past is when they strip the drain bolt head. At that point, you most likely need to remove the plate so you can use whatever method available to remove the damaged drain bolt head.
These skid plates can be dropped in 15 seconds and you can take 2 sips of coffee during that 15 seconds