A connector comprises an adapter housing coupled to a connector housing. An adapter insert has a first cavity formed therein. The first cavity is shaped to at least partially restrain motion in a first lateral axis of a flat cable placed therein. An apparatus for connecting a flat cable to an electrical connector comprises an adapter housing. An adapter insert has a first cavity shaped to at least partially restrain motion in a first lateral axis of a flat cable placed therein. An elastomer spring element is disposed in a second cavity in the adapter insert. The elastomer spring element imparts a squeeze on the flat cable at least partially restraining motion of the flat cable in a second lateral axis substantially orthogonal to the first lateral axis.