In one embodiment, both the welding body portion 66 and the core of the locator 68 are one piece of Nitinol, which tends to assume a pre-selected configuration, e.g., a hook, that is advantageous for an intended function once it reaches a temperature range such as from the room temperature to the body temperature, e.g., from about 25??? C. to about 35??? C. Alternatively, the locator 68 and the we