Hitachi Zaxis 33U-5A Operator's Manual page 53

 Never attempt to disassemble, repair, modify or displace the
communication terminal, antennas or cables. Failure to do
so may result in damage and/or fire to the base machine or
to the communication terminal. (When required to remove
or install the communication terminal, consult your nearest
Hitachi dealer.)
 Do not pinch or forcibly pull cables, cords or connectors.
Failure to do so may cause short circuit or broke circuit that
may result in damage and/or fire to the base machine or to
the communication terminal.
SAFETY
S-41