Here is the superlite on my 2010 4runner
The long bolts supplied are too long. In the photo i have some medium and short bolts with a stubby 13mm wratchet wrench avalible at harbor freight.
slide the square nuts into position with the super lite off center
notice in the picture one rail is on the thinner crossbar and the other is closer to the rail where th cross bar inserts into the rail tube.
use the medium bolts for the thin section and the medium bolts for the thicker section. I run an awning so it has to be offset anyway.
Let me know if you have any questions
the forum will only allow me one photo per post so let me try to add some more photos