A quick-connect adaptor for conveying data or data and power from a first electronic unit to a second electronic unit. The adaptor includes a connectable interface between a first body part and a second body part, wherein the parts may be coupled with rotationally symmetry such that a 180 degree rotation of either body part, either clockwise or counterclockwise, results in an identical electrical connection, eliminating the need for checking alignment when making a connection. The first and second body parts in either of two rotational orientations are secured together by a magnetic “snap” connection. Three-piece and two-piece kits are disclosed for coupling with popular devices. In an optional embodiment, at least one end of the interface includes a “smart sensor” and a processor or logic gates that configure communications so as to be correctly wired in either rotational orientation, even before an electrical connection is made.