Just be careful not to break the little metal pieces that are moulded into the plastic when you go to *pop* the tail light out. if you break them off it looks to me like you would end up having to have to replace the light...
I was able to stub the wiring thru to my bumper cover and mount it accordingly.
Also, tractor supply has some slick kits that allow you to mount a little bracket and keep all the wiring vehicle side hidden. I don't know if I'm allowed to post pics, but If I am allowed to I will snap some, host and post them for your viewing pleasure.
2008 VW Rabbit