How do I install led lights tube?

So I have this Led lights tube, but it only has the option to connect it by the 12V power outlet in the car. I tried to connect the wires to a switch that I have already installed but it doesn't work. What do you recommend me? Do I need to use the fuse to make it work? Do the wires are pos. and neg.... show more So I have this Led lights tube, but it only has the option to connect it by the 12V power outlet in the car. I tried to connect the wires to a switch that I have already installed but it doesn't work.

What do you recommend me? Do I need to use the fuse to make it work?
Do the wires are pos. and neg. respectively or can I use them both as I need?
Is there some way to connect it to the fuses? So when I turn the lights on they go on too?
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