well. when you want to run something, there is a right way and a easy way. The easy way is what your describing, not taking the time to pull everything apart and run it correctly. Honestly, there is only 1 rule to follow in cars, if its not worth doing right, its not worth doing. Its not going to take that long to take off a few panels here and there, honestly even if your a noob it will only take you maybe a few hours on a saturday, especially since all your doing is running a cable. And really, all you have to take off are the under dash, the center consol, and the drivers side pillar, run the wire, zip tie it a few places, and bam, done.