Lenovo IdeaPad U460S User Manual page 20

Chapter 1. Getting to know your computer
AC power
adapter jack
Note: For details, see "Using AC adapter and battery" on page 12.
Kensington slot
Note: For details, see "Attaching a security lock (not supplied)" on page 24.
6
Connect the AC adapter here.
Attach a security lock (not supplied) here.