Cut the female connector off the LED strands. This is the IN end. These lights are directional so if you hook up the wrong end, they won't work.

With the resin bump facing you and the wires pointing up:

• Left wires go to VOUT
• Middle wires go to G
• Right wires go to A1

These LEDs are not manufactured by Adafruit so there may be variation in how the different lots are wired. If your lights don't work with this configuration, you might have a strand that's wired differently. Experiment by hooking up the different wires to alligator clips to figure out which wire is which.