King Ant RX8 Kumo

HI guys

Just a few things im stuck on - hope somebody can point me in the right direction.

Ok, i am wanting to install some small red led's under the rear seat and some flexi led wire. I can install that part ok its just the wireing up. I know how to but am struggling how to get the 12v feed into the rear of the car. I ideally wanted to take the cig lighter out and take the feed of the rear and fit a 4 way adaptor then i can plug the 2 things in to that, however ive only had the car a few weeks and its near new and dont want to pull trim of (as i dont know what im doing) and end up breaking something.

Can anybody tell me the easiest and best way to get a 12v feed (whilst still jeeping the cig lighter free at the front) so i can install a 4 way adaptor and plug my LED's in?

Any help/pics would be fantastic.

Thanks in advance guys

Anthony