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Unless someone has a wiring diagram for such you may not get the answer you require.
But if you had access to either a test lamp or multi-meter you could soon find out.
Of the 3 cables one will be an earth - one will be to power the lighter heating element and the other for its interior light bulb
Also remember the cigarette lighter has a limited ampage it can carry which is around 15 amps but is only intended for intermittent use (not continous). So before connecting anything up find out its likely power consumption
Currently in madnoel10's garage:
Honda Civic 1.4l