Sorry, I'm not comprehending. Do I need to do the remapping or not?
You do not
NEED to do the remapping, you could just mark the keys appropriately and learn that on that keyboard the position of the command (⌘) and option (⌥) keys are reversed. If your husband is a skilled touch typest whose fingers automatically go to the Apple keyboard positions for ⌘ and ⌥ then remapping would probably be very important to him.