Fully boxed rails, 1/2" threaded hole on the outside of each frame rail about 2' back for headlight wires, and 1/2" holes on top 30" back from those holes at the inside front edge of the body on both sides. I have tried a shop vac pulling a string, no joy; and played with two hooked wires trying to get attachment. Anyone have any neat time saving tricks for getting the first string/wire point to point?