I just bought a 2nd gps to be mounted on the second help area outside. I am looking for an idea that I can remove the Unit and I want the cables (power and network) to retract and be sealed from the environment. Something with a cap on it, where I can pull the cable to attach it to the unit and when the unit is not in use, I can push the cables back into the steering box, and seal from the weather... The GPS will be mounted with the removable bracket that comes with the unit attached to the top (or near the top) of the external helm station? Not through he bulk head, but the gps will be in that green box....