An LGA connector assembly includes an LGA connector and a generally rectangular pick-up cap mounted onto the connector. The connecting element includes an anchor for securing the connecting element to a bone, in particular a vertebra, a first lateral opening, and a top opening with a first inner screw thread. A centrifugal mechanism connected to the decompression cam shaft maintains the decompression cam shaft at an operating position in a starting rotational region, and rotates the decompression cam shaft to the release position in a normal running region. If a phase correlation is not detected, however, the downlink signal is sent in a non-directional manner in the form of several components produced using at least one diversity technique.