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Page 56
Mount extruder 1(E1) and extruder 2(E2)
Extruder 1 and Extruder 2 are much easier to be assembled. You can follow the above
steps except that there are no wires for the hotend, so you just need to connect the
motor wire and the fan wire.
You can finish the extruder assembly first and then mount them on the top plate.