Abstract: A connection device for connecting two structural components is comprising a retaining means in a first structural component and a fixing means for insertion in a second structural component for connecting engagement with said retaining means thereby holding the two structural components together. The fixing means comprises a plug member having a first end and a second end, the said first end comprising an undercut head for insertion in and retaining engagement with said retaining means. The said plug member is comprising means for engagement with said second structural component.