Retention device for separable connection

A removeable snap-in retention arrangement comprising:

• a first element defining a first hole;
• a second element stacked upon the first element and defining a second hole in axial alignment with said first hole;
• a retention device including a primary member for retaining the first element and the second element together, said primary member including a base portion generally located above the second element, and hooks located under the first element, said base portion cooperating with said hooks to restrain said first element and said second element from being withdrawn from each other;
• and
• said retention device further including a secondary member for separating said first element and said second element from each other;
• wherein
• said secondary member is essentially constantly retainably associated with said primary member regardless of whether said first and second elements are retained together or separated from each other, and is moveable relative to the primary member along an axial direction of said aligned first and second holes, by an imposed force, from an original position to an operation position to have the hooks inwardly move radially perpendicular to said axial direction from outer locking positions so as to disengage the first element from the hooks and separate the first element from the second element;
• wherein said secondary member automatically/recoverably returns from the operation position to the original position relative to the primary member after said imposed force is removed and the hooks return to locking positions.