https://www.speakerlightkits.com/Manuals.html

Skip the music controller, it’s too sensitive.

You use one controller OR the other. You DO NOT hook both of them up.

If you are using the standard RGB controller, it is pretty obvious. You connect each of the (2) output connections of the controller to each, of the two light strips going to the light frames.

If you are using the music controller.....you will need to use the 3-way splitter you have pictured there. One connection will go to the one output wire on the music controller and two of the other three connections will go to the two light frame input wires.

The rest of the install and connections are as explained here:

http://www.speakerlightkits.com/SPIKE_2_Install.pdf

Doug (SpeakerLightKits.com)

PS: While that is my light kit, that is NOT my music controller. I sell a standard sound controller and it has the same two output connections just like the standard RGB controller. It makes the connection and swapping in and out of the two controller types identical to one another. Though, using a 3-way (as pictured) or even a 2-way splitter wire is quite straight forward and easy to do.