The ECS-2 extension cable set is designed to connect Hydro-X to most LED drivers using pigtail wiring. The ECS-2 comes with a 16-foot RJ12 cable, a Y-splitter, and a special 4-foot RJ12/3.5mm jack cable. The special cable connects to your LED lighting fixture/driver using the two-screw terminal block to connect to the loose wires on the LED driver. Simply connect the two wires from your LED driver to the terminal block, each of the lights being controlled are connected in a “daisy-chain” configuration back to the Hydro-X LMA adapter.