A card edge connector includes an elongated housing extending along a lengthwise direction thereof and having a pair of opposed side walls, and a central slot between the side walls. A plurality of contacts are retained in the housing and exposed to the central slot. A pair of ejector mechanisms are rotatable retained on two opposite ends of the housing. A pair of auxiliary insulators are attached to the ejector mechanisms, respectively. A tie wrap is located on the auxiliary insulators to urge the auxiliary insulators to prevent the ejector mechanisms from rotating.