If this is an RGB LED setup and the 4-wire connector goes to the LED strip, flipping the connector won't work because 1 wire should be constant hot (or ground) and the other three would be opposite. This would depend on the type of diodes they designed it with whether it's common + or common -. If you have the LED strip disconnected you should be able to figure out this with a volt meter. What exactly did they say regarding the light indicating a polarity issue? That could mean different things, control module polarity or POU device polarity.
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