Ok Ill go super ghetto cuz that all I can understand sometimes. Light will travel from one point of the fiber optic strand to the other. Drill super small holes in the wall of whatever you want to illuminate. Now start running the fiber optic strands through the holes. Leave about 1 inch poking out. Super glue the strands from behind the holes. Once you have all the points you want illuminated, bundle up all the fiber optic strands inside with tape/glue gun what ever. Cut them off at the end. This is where your light source should go. It can be as simple as a small flash light or remote switched LED. Make an access port so you can change out burned light bulbs. Now paint the outside of the space ship hull ( or whatever) with the fiber optic strands just hanging out. It will look funky, dont worry. Once you have finished painting/clear coating etc., now is the time to clip the loose fiber optic strand at the base. This new cut will allow the light to pass through. Done.
Hopes this helps.