Dell Latitude C/Port II APR System Information Guide 15
3If you are using the docking device with a monitor stand, close the
computer display.
4Ensure that the eject/locking lever is in the unlocked position.
5Dock the computer to the docking device as follows:
Docking the Computer
aHorizontally center the computer on the APR platform, with the
back of the computer facing the docking device docking
connector, as shown in “Docking the Computer.”
bSlide the computer toward the connector until you feel the
grooves on the bottom of the computer engage with the alignment
rails.
NOTICE: If you attempt to push the computer all the way into the APR
without engaging the alignment rails, you may irreparably damage the docking
connector on the computer.
NOTICE: Do not pick up the computer or the docking device separately when
they are connected because you may damage the connectors on the computer
and the docking device.
docking connector
alignment rails (2)