Review on 3M 9.84ft 3 Pin JST SM Male Female Plug LED Connector Cable for WS2812B WS2811 SK6812 Symphony LED Lights with Connectors, SM3P Buckle-Free Welding Plug Light Controller Wire (2-Pack) by Doug Darling

I have a set of 2 LED strips with 2 WS2811 LED strips, a SP110E LED controller with a parallel output for 2 strips and a 12 volt 5 amp power supply. The game plan was to use 2 extension cords to go from 2 strips to a weatherproof box for outdoor installation. When I connected both extenders to the LED controller outputs, I got color flickering, wrong colors and noise in the data. I've only tried one wire plugged into the LED controller while the other is plugged directly into the 2nd track and it works fine even at max brightness with a mostly white pattern so 1/2 problem solved. Incidentally, the LED strips are standard 5 meter strips. Maybe 2 shorter extensions would work. It's not together.