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	Y3 ConnectorFront side of 2Y, 10 pin connector (3.81mm pitch).  
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	Y2 ConnectorLeft end of 2Y 8 pin connector (5.08mm pitch).  
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	Y1A, Y5 & Y4 ConnectorsRight end of 2Y RJ45, Circular 8-pin, Molex™ 2-pin.  
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Go here for the 2Y User Manual (html version). Here is the schematic page. More kit information here.
We update 2Y documentation from time-to-time in response to your feedback (see footer below).