The belt should cross to the left of the printer, and the teeth should engage the toothed idler on the shorter, inside shoulder bolt on the rear idler mount.
From there the belt should follow along the back of the printer, with the toothed side wrapping around the lower toothed idler on the X carriage.
Put another belt clip on, and insert the bolt into the lower rear hole on the Y carriage. Attach it with (1) m3 x 45mm bolt and (1) m3 washer.
Be sure the belt is properly seated around the idlers and pulley, and not twisted along its length.
Don't worry about the belt being tight - we'll tension it later. For now "close" is good enough.
Cut the belt, leaving an approximately 1" tail in case you need to adjust it.
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