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The doorbell has two wires, one wire connects to the port labeled front or back depending which side of the house you're installing it at, and the second wire simply connects to the transformer port. Either wire will work on either connection.
Sorry, there was a problem. Please try again later.We also have 5. We found the 2 that are connected to each other. Look for a wire that goes from point A to B and use those 2
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