Veratron VL FLEX 52MM Serie Bedienungsanleitung Seite 14

ELECTRICAL INSTALLATION
Now connect the red ring-type connector to the positive pole of
the 12 V battery.
For this just clamp the ring under the screw nut, that's used to
tighten the vehicles power cable to the batteries positive pole.
In addition for the 24V variant:
There is a brown wire with a ring-type connector next to the red
one. Attach this to the positive pole of the second battery. Make
sure that the wiring fits the schematic, shown on the right.
Connect the red wire to the ignition.
The installation of your IBM is now finished. If you switch on the
ignition, the device should start up.
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