Try this Annie, if you are facing the car on the left will be the bonnet switch signal, the bonnet should press on this from memory to give the all clear of closing. If you can check and see if this is working ok. Unfortunately I don’t have my GS at home so can’t take a photo, have a look here part number 27.
https://www.scuderiacarparts.com/en-gb/part-finder/maserati/4200/oe/60/3551/62478?h=193964
