Step 1: Testing the EL wire
Plug both orange EL wires into the splitter and the splitter into the inverter. Connect the screw terminal block with the power supply.
Plug the cord of the power supply into an outlet. If everything works, the EL wire lights up as shown in the picture and you hear a high pitched sound. This is normal and comes from the inverter.
(If it does not work make sure to unplug the power cord first before you manipulate anything else.)