8100 led wiring

I only have an led from a 7600. The connector is the same but it doesn’t light up when 8100 is powered on. I have two 8100 boards and same thing. Anyone with a wiring diagram for the connector?
 
I only have an led from a 7600. The connector is the same but it doesn’t light up when 8100 is powered on. I have two 8100 boards and same thing. Anyone with a wiring diagram for the connector?
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That's the connector on the board. Pin 1 should be marked (or have a square pad).

You want the side of the LED with a slight flat on it at the lead end to be going to pin 5
 
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