Reaching the back of the outlet will not solve your problem, since the wires running to the outlet actually loose power when you turn off the ignition. It is a "switched" outlet, meaning when the ignition is off, the power is switched off.
On my old car I just tapped into a constant 12v wire under the dash and ran it to the lighter outlet. Once there I replaced the "switched" wire with this constant wire. Also, and very importantly, put an in line fuse in the new wire you run. This will help protect your electrical system. Use the same rating fuse as what your cigarette or AUX outlet uses to be safe.
Just remember to put that in line fuse in so you don't have a problem bigger than your GPS going off and make sure you disconnect your battery before doing any of this. These constant 12v wires are "hot", if you ground one by mistake you may short out something very important.
Above is just an idea using the past experience I had with my old car, proceed at your own risk. :innocent:
Maybe I didnt phrase my request correctly.
I understand the switching etc, really what I meant was how can I dismantle the plastic console in order to access the wiring so that I can run a fused line from the battery.
I really dont want to start ripping plastic pieces off.
I talked to the mech who does my servicing he said he will do it through the fuse box
This might be the easiest method, using the existing wiring and using an external fuse of the same size.