M_Boats: Where does this wire end?

https://www.dropbox.com/s/he3d0wj5fm3ayno/20160128_174720.jpg?dl=0 Your looking from the v berth out towards the companion way at the "ceiling" over the sink...the blue and green wire that feeds that little bus bar goes into the fiberglass there. I can't for the life of me find the other end. The little bus bar is unpowered at the moment and the blue/green feeds it. On a positive note...stern light is now working from panel for the first time in forever like the nav light! Whoohooo! Jazz