Immediately above the emergency flasher button there is the AIR BAG door, and just to the right is another little door with writing that is unreadable without a light, that says MAP. Pop the little door open with your thumbnail and there is the SD card.
The MAP writing is hard to read because they didn't highlight it with white color, I guess they don't want you to read it other that every couple of years when the latest update comes out. The update currently available for download is from Oct, 2023, so less than a year old.
I hope this helps, I spent a couple of hours becoming an expert, a couple of hours for a 15 second task.! It's all in knowing where to look..! Of course the download takes 30-40 minutes. You get a new, colorful display with a number of improvement in addition to the latest maps. Have fun..!