Flat conductor termination device

An electrical connection termination device includes a box contact which accommodates a flat conductor of a flat cable. The flat cable includes an insulative layer substantially covering the flat conductor. The box contact includes a box structure at one end and a strain relief structure at another end. The box structure includes four sides so as to form the shape of a box having open ends. One of the sides of the box structure includes a flexible tab. The strain relief structure attaches to the insulative layer of the flat cable. The flat conductor extends through the open ends of the box structure and is positioned near one of the sides of the box structure where that particular side opposes the side of the box structure having the flexible tab.