The front panel of the main unit can be removed.
By removing this panel when you leave the vehicle, you can prevent the theft of the main unit.
Press the [Detach] button.
The left end of the front panel detaches from the body of the main unit.
Remove the front panel.
Hold the front panel and pull it toward you to remove it.
Put the front panel into the case.
Push to open the front panel case and put the front panel in it.
Insert the right end of the front panel into the main unit.
Engage the catch at the right end of the front panel with the lock on the main unit itself.
Insert the front panel.
Press the left end of the front panel until it clicks into place.