I took one of my Model 3 key cards to the factory today and had the techs x-ray it to locate the delicate bits that should be avoided should someone to want to punch a hole for a valet key chain or hook.The field of view of the x-ray is limited (it's for chips), but here's a set of images that should help. Keep in mind that the antenna coils may move around a bit. You don't want to nick one, so I've added a green area in the third image where I'm advising a 2x "T" margin, as measured by the "T" in the logo, as well as using the "S" to keep clear of the top right where the chip connects to the antenna leads.I should add: I'm not saying punching a hole in your card is the best way to hand it to a valet (there are pouches). I'm just saying IF YOU DO (or if like me you just wanted to know), here's what to keep in mind.