NEC 140He User Manual page 269

4.
Insert the power supply unit into the slot.
IMPORTANT:
power supply unit, do not tilt or twist the unit as you push it into the connector.
NOTE:
Make sure that the power supply unit is pushed in to an end securely.
5.
Connect two power cords to AC inlet.
Use the power cord provided with the power supply unit and the one provided with the optional unit.
IMPORTANT:
Keep the removed blank cover for future use.
Be sure to push straight the power supply unit. To avoid damaging the
A blank cover is attached to the slot for additional power supply unit.
AC inlet
AC inlet for additional
power supply unit
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