There are two pre-installed long screws on the cover
plate. Put the cover plate in the proper position and
what you need to do is tightening the screws. Then the
cover plate is fixed.
2) Put on the cover plates and you can knock the knockouts
when you need to lead the power cables out.
4.9 Power on
Double check all the power cable and communication cable
between batteries and between battery and inverter. Switch
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