Hitachi ZW 120-6 Operator's Manual page 49

 Do not attempt to disassemble, repair, modification and
displacement of the communication terminal, antenna
and cables. Failure to do so may cause damage or fire on
the machine and the communication terminal. (Before
removing or installing the communication terminal, consult
your authorized dealer.)
 Do not pinch or forcibly pull cables, cords and connectors.
Failure to do so may cause damage or fire on the machine
and the communication terminal due to short/broken
circuit.
SAFETY
S-39