[OhDonPiano]

It might show if you have the original window sticker. Worth checking.

 

[OhDonPiano]

View attachment 155770

Hmm I don't see what I would be looking for in there ... Double take illuminated door sill plates but I don't think that's it. Maybe dealer can tell you .. not sure.

 

[OhDonPiano]

Dealer has apparently had them as an option on the QP whoever these specific ones may be aftermarket maybe? I checked on Google and yours look like these.

From the QP brochure:

Courtesy lights with logo kit

To allow passengers perceive a touch of exclusivity when getting in and out of their vehicle, Maserati has designed a Courtesy light Kit with Logo for Levante, Quattroporte and Ghibli. The kit, specifically tested and approved by Maserati, consists of two couples of lenses, one with the brand...

us.maseratistore.com

From Amazon:

Now that I look at them it looks like all of the models have the ability to accept a factory courtesy light however your specific design appears to be aftermarket.