Use these adapters to go from an Xconnect dangle on your controller to a strand of LOR connector pixels or an LOR connector extension (then pixels). Both the dangle and the pixels must be 3-pin 5v or 12V. These adapters are not compatible with 4-pin 5v Light-O-Rama equipment.
This means you are trying to connect:
FROM an xconnect end connector dangle/extension
TO an LOR end connector extension/strand of pixels.