Holding the plug vertically with the cord going down and looking at the connection points. 1 is top left, 2 is top right, 3 is second down left and so on with 9 being lower left and 10 being lower right.[51]
What is not shown on the this diagram is that Hayward now uses pins 7 & 8 which are shorted on some current Hayward cells to detect an OEM cell with newer controllers.
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