How is the Speakon connector wired for REL sub?


Recently purchased a used REL T2 sub that came without the Speakon cable. I just got the Speakon connector from Parts Express but am not sure where each wire is attached on the connector. Anybody familiar with the wiring configuration on these cables? Which pin gets left, right and ground? Thanks.
timrhu
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@waterzlife I found the Neutrik NL4FX 4-Pole speakON Cable Connector to be superior to the Neutrik NL4FC 4-Pole speakON Cable Connector.
Although both will work the NL4FX has a more robust easier to use thumb mechanism. I have used both purchased on Amazon.
On Neutrik SpeakON:
Black 1-
Red   1+
Yellow 2+