12V Power for Schwintek compartment

I would like to add some closet and compartment lighting in my Schwintek slide. Problem is, you can't bring it in through the bottom like traditional slides do with a coil cord. The bottom of the slide isn't at the bottom of the RV, it basically slides into the wall like a big drawer and sits on top of the floor inside.
So for those of you have have power in your Schwintek slide, how did they do it?
(Sorry, don't want to use anything that has its own battery).

Thanks,
Scott