Abstract: Apparatus for securely attaching a casing to a person includes an elongate strap and a strap connector having a male retainer at an end thereof. The strap connector has a female retainer at an opposite end thereof. A casing defines first and second openings connected by a passageway. The female retainer is snap-fit to the casing in the passageway of the casing through the first opening. The male retainer is snap-fit to the female retainer in the passageway through the second opening.