They aren't stickers, they are simple icons printed directly next to each screw hole with a table under the battery. It's very slick. Not vital as you say, but very nice. Especially if your manual is a pdf, the task is 20 pages long, and your only computer is the laptop.

Thinkpads have a lot of nice little touches like that. Mine even has drain holes for the keyboard in case of beverage. How often have i spilled? Never. Do i appreciate their presence? Very much so.

I have to inquire as well, how many laptps you serviced? 'cause they are usually a complete pain in the *#?!$.