A retainer that is attachable to a set of interfacing cables prevents physical separation of the cables while allowing electrical disconnection of the cables. The retainer uses a body member with a hinged end cap on each end. The end caps include a snap pin and the ends of the body include receiving voids for the snap pins. The end caps can be locked into place by rotating around the hinged attachment until the snap pins engage the receiving voids. Either one or both of the end cap and elongated body have notches that form restraining voids when the end caps are locked in place.