After opening the wooden box, take the filament holder out and mount it on the back of the printer.
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Take out the filament holder. There are four screws that come with it.
Mount the filament holder to the 3D printer using the M4 wrench in the tool box.
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Plug in the connector according to the position shown in the picture.
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Take off the filament loading tubes set:
Why don't connect the tubes?
When the extruder withdraws or retracts the filament, it cannot push the filament back to the filament spool for nearly two meters.
The unconnected areas of the tubes are to store the filaments pulled out by the extruders.