On the starboard side of our CD-22 there is an opening in the aft bulkhead of the house through which cables, wires and steering hoses run between the helm and the motor well along the starboard gunnel. There is more space in the opening than there are things in it and I suspect that it would serve as an entry point for mice and other critters that might be attracted to food kept in the interior of the boat. I was wondering what others have done to seal off this opening while still making it easy to run new wiring through it. I had several thoughts -- slices from a foam swimming pool noodle jammed in to fill the void would be relatively easy to remove. Another thought would be a modest amount of spray in insulating foam thorugh which holes could be drilled for new wires. I have ruled out various caulking products such as 4200 or silicone as clinging too tenaciously to the wires, hoses and cables. The reason for my concern is that I live back in the woods and the boat will live beside the garage. I have a hard time keeping random acorns and other nuts out of the engine compartment of my truck so I know there are more then enough critters to completely clean out the boat! On one occasion, the little beasties ate a vacuum hose and I lost the 4WD on the truck! I also figure that if things are held firmly in place, there will be less chance of chafe. What have you done address the issue?