Reason for my asking is this: Usually when I add lights to a model I drill holes into it and fiddle the wires through them. I plan the lighting before I start the build. As you have already assembled the crawler I think it could be very tricky to hide them in the aftermath. HOWEVER, as you mentioned, the wires are pretty thin. You could attach them to the outer perimeters of the single components with white glue and paint them to blend them with the background. In the end they could look like replicated details of the real thing. That is, of course, if it is possible to do so. Nevertheless, according to what you have already accomplished I'm sure you will find a way that not only satisfys the need but also looks great as well.
