Got a rack off EBAY as above but no instructions. its this type https://www.wemoto.com/parts/picture/wk-gi-232f-m3 Is it just the large main bolt that fixes the Aluminium angle arm to the plastic top rack?
when I've used a mono rack the plate has been the two bolts, one each side, going through the rack into the aluminium angle arm. Adjust the plate to get the angle you want then tighten each of the two bolts that slide into the recess elongated slots you can see. http://www.giviluggage.co/givi-product-focus/the-givi-monokey-plates-in-full-detail/
Cheers for that Noobie. I thought so but had doubts. I am trying to mix Nonfango rails with a Givi plate so wish me well! What confused me was the second hole on each plate