A gooseneck coupler may be used on a towing vehicle to help tow certain types of towed vehicles, such as trailers. The device has a pair of opposing positioning surfaces, at least one of which has a magnet cradle for mechanically engaging an implant magnet associated with a magnet position in the implantable device. The system also includes a cluster administration computer coupled to the multiple network accessible computers to monitor the operation of the network accessible computers. Smaller mechanisms can also be installed with simple hand tools and do not require installers to rent expensive cranes or installation equipment. The tapered section functions as a fuse to arrest the propagation of optical power induced damage by leaking optical power from a waveguiding region below a threshold, below which further propagation of damage is not supported.