End piece for a sunshade's edge rail and sunshade

An end piece for a sunshade's edge rail, said end piece comprising an end plate, said end plate having a first edge surface, a second edge surface, a first end surface and a second end surface to be placed against an end of the edge rail, said second end surface being provided with at least one gripping protrusion adaptable to fit inside the edge rail, and said end plate being provided with a first hole for the penetration of a guiding string, wherein the end piece includes a string channel, said string channel having a width, a first end which opens onto the first edge surface, and a second end which opens onto the second edge surface, and said first hole opens into the string channel, between the string channel and the first end surface is provided a wall, said wall including a through-going groove, said groove having its first end at a first end of the string channel and its second end at a second end of the string channel, and said groove having a width which is substantially less than the width of the string channel, and wherein the wall is provided with a through-going aperture, said aperture having a width exceeding the width of the groove and said aperture being in alignment with the first hole.