Although I have the Clarion unit I'm nearly positive that orange wire is the antenna wire. You can probably check by looking at the documents for the headunit online or in the materials you have. Assuming it is, I know mine is simply about 2 feet of wire that ends just by being screwed to a place inside the hull. Its not attached to anything further for reception like an actual antenna from what I can tell. Its just the wire itselff that serves as the antenna. If you can't reattach it, I would just secure it with a zip tie to something so its stays somewhat fixed and not in contact with other wires which may subject it to interference. If its working, leave it alone!! I hope that helps.
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Former owner of:
1996 Four Winns Horizon 200 5.8L VP
2006 Four Winns Horizon 260 8.1L VP
2007 Sea Ray 290 Sundancer
Current boat
2004 Sea Ray 290 Sun Sport Twin 350 Mags
