Porsche Boxster 2006 Owner's Manual page 181

12.Swing locking lever of front latch to the rear
(arrow A).
The locking hook must engage in the
windshield frame (arrow B ).
When the hardtop is correctly latched, the
white marking stripe on the red locking button
(arrow C) must be visible.
Caution!
Risk of damage due to inadvertent operation
of the convertible top when the hardtop is
fitted.
f Make sure that front locking lever A is always
correctly locked.
This disables the convertible-top drive.
13.Fit cover on the front locking lever.
14.Insert the plug of the hardtop heated rear
window into the socket.
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Mobile Roofs