A Prusik knot has several helical wraps around a tether line or a lifeline, a longitudinal loop extending over the wraps, and free end portions tucked or threaded under the loop. In one embodiment, a socket is dynamically allocated, the socket including a dynamically allocated service. A mount bracket engages each of the channels. While precompression is being applied, a set of pins and a plastic frame are insert molded around the fuel cell assembly to hold the components in place.