An apparatus for covering a child car seat attachment anchor includes a sleeve that is formed in a single piece, a slot in a first face of the sleeve that defines an opening extending towards a second face of the sleeve opposing the first face, and a rib of the sleeve located at an end of the opening forming a retention surface for the child car seat attachment anchor. The sleeve has an outer shape forming a quadrilaterally faced hexahedron. The retention surface extends in parallel with the second face. The apparatus can be used to cover an ISOFIX wire that extends from a seat crevasse.