Cable Anchor Trunk/Lock ComboDont let some jerk steal your bike! We've combined our Cable Anchor Trunk with a sturdy cable lock. Since SeaSucker bike racks arent bolted on to rooftop bars, we came up with a way to keep your bike safe. A Cable Anchor is just what it sounds like an anchor point to securely connect a cable loop to your car. The Cable Anchor Trunk, has a steel rod that closes inside a trunk or hatchback seam, the plastic dipped coating protects your cars paint.