an apparatus , system and method for inserting a contact having an insert portion , a textured portion and a head portion , into a surface of a molded shell made of plastic or other similar material . an opening is provided in a portion of the molded shell that is smaller in size than the contact and the contact is aligned into the opening . energy , such as heat energy , ultrasonic energy , and / or infrared energy may be applied to the contact at one or more predetermined energy levels sufficient to cause the substrate to at least begin melting , and a force may be applied to the heated contact to push the heated contact into the substrate such that the plastic material forms a seal around the textured portion .