Paxar Mobile Work Station (MWS) Monarch 9876 - Manual (Page 24)

Make sure the ground wires are attached using one M5 screw with two M4
nuts and M4 washers as shown.
WARNING
This equipment contains components which can produce arcs
or sparks. To prevent fire or explosion, do not install near
Flammable materials or in locations that require
ignition-protected equipment (including gasoline-powered
machinery, fuel tanks, joints, or fittings).
4-4 Power Options
Ground Wires
Battery
Strap
Battery
Support