User`s manual

at least every three years. Always replace both batteries at the same time with
brand new batteries. Never install previously used batteries in your helmet.
To replace the batteries slide out the battery holders from either side of the
cartridge and discard the old batteries. Install the new batteries in the battery
holders and slide the battery holders back into the cartridge.
Note
Always note the polarity of the batteries and install them as
shown in the diagram and as marked. Batteries rely on good
electrical contact to function properly and so always use clean
dry hands and avoid getting dirt inside the cartridge when
exchanging batteries.
6-3. Changing the inner cover plate on the 5000X Auto Lift
From inside the helmet unclip the installed cover plate from the shell noting the
locking tags on either side of the helmet (see diagram).
Remove the film from both sides of the new cover plate and then insert first one
side and then the other into the relevant slots on each side of the helmet.
Note
Always check to ensure that the locking tags on each side of
the helmet are properly mated with the slots in the cover plate
and that the four raised guides on the helmet shell are located
in the matching slots in the cover plate