Hi. I just managed to get two of these systems for 30 euros each. As you can see in the photos they have 2 wires coming in one in each side, cant really figure whats going on. The only reasonable explanation is that on of them is to power an adjacent grow kit, in series, for multiple applications in a greenhouse or something. The question is, how do i wire these suckers ? I am in a rented property and already had electricity problems, dont want to damage a circuit by doing experiments.