I have a fiberglass front valance. i have the stock 1970 directional units to bolt in. my question is this: do the amber lenses pass THROUGH the valance and mount to the directional lamp housing. i will need to shape my fiberglass opening for this to happen, and i think this is common procedure for fiberglass parts. I cant see mounting the directional unit behind the valance opening because i would need to take the whole unit out to be able to change the directional lamp.