Just finished wiring this bus for headlights using fiber optics. My first attempt with this type of model lighting and i'm pleased with the result.
Materials
I drilled out the head and tail lights and ran in the fibers. Then drilled out the head of the LED and super glued the ends into the hole.
I melted the end of the fibers into a ball and glued them in place
Drilled a hole through the layout and mounted it in place