Cut three L angles 260mm long. Draw a center line on one flange and mark the first rivet location at 10mm from the end. With a #40 drill bit, predrill the first hole on the mark. Cleco the L angles to the Baggage Floor and rotate the L angles so the center line is visible through the predrilled holes in the Baggage Floor and clamp them in place. With a #40 drill bit, back drill through the holes in the Baggage Floor into the L angles and Cleco. With a #30 drill bit, expand the holes and Cleco.