The instructions should highlight the routing of the extruder motor wires, directing the assembler to ensure they feed through the channel next to the fan.
I snapped a small part of the X-carriage off while doing this. The X-carriage swings away from the lower rod and bearing. I pressed it back in place but the bearing had moved to the right. This slight pressure snapped off part of the horizontal piece that is supposed to hold the bearing in place.
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