wiring
The big wire is for grounding of the mast to the keel. leave it alone.The deck light may need replaceing or it could simply be the wiring connected to it which may be corroded. Remove the plug base and dig out the sealant. IF you have done that and cannot get any extra wire to come out, then look below near the compression post and see if you a teak plate, fiberglass piece or inspection port to see if you can access to the wiring. IF not, then I had to drill a small hole to get to the wiring and had to remove some jputty to do so. If you have to drill, be careful not to cut any wiring that may run in the trough. If you need to call me, call Hunter Marine and ask for Gregg and get my number. jGive me a holler and I willl help you. Crazy Dave Condon