A wire containment cap with a flexible seat is presented. The seat sits below an opening in the rear of the wire containment cap. The seat has a base with a pair of flexible members initially extending upwards from opposite sides of the base and then curve towards each other. In one embodiment the ends of the flexible members can curve down and towards each other in order to better conform to the shape of a cable. Alternatively the seat can be replaced with a U-shaped saddle with flexible arms supported by a post.