The splitter cables go from 1 male to 2 female 4-pin Molex MicroFit 3.0 connectors. This is the same connector on the ViVi Music LED Controller and extension cables. Also included are three LED adapter cable that goes from male 4-pin Molex to 3-pin JST-SM which connects to WS2811 and WS2812B LED strips.
The LED controller is awesome, but their customer support is even better. They've been sooooo helpful in the setup process. Extremely quick to respond and answer questions.
Simplified the wiring - expensive but perfect clean solution.