Dell XPS 10 Tablet - Manual (Page 37)

Using XPS 10 Mobile Keyboard Dock | 37
Slide the tablet downward until the tablet clicks into place. When 3
the tablet is correctly connected, the tablet-release latch on the
dock will move to the Locked position.
NOTE: When the connection is made, you need to manually turn the
on-screen keyboard off if it is displayed on the screen.
NOTE: You can reinstall the docking-port covers when the tablet is
not docked.