A medical device lead connector includes two or more electrically conducting contact rings spaced apart by electrically insulating ceramic ring. The contact surfaces have a tooth system thereon including intermeshing teeth and recesses. The filaments of the frame may be provided by laterally spaced pairs of filaments of weldable material. The pivot assembly further includes an attachment bracket that may be rotated to accommodate at least two different sizes of trailer tongues. The receiver, in the proximity of the pleats, has a plurality of outward-pointing bulged portions that form a recess and at least one inclined receiving edge.