Use these adapters to go from an LOR connector dangle on your controller to a strand of xconnect pixels or an xconnect 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 LOR end connector dangle/extension
TO an xconnect end connector extension/strand of pixels.