Bongo Fury

Hi guys, am trying to fit a fiamma cycle pro rack to the rear of a p-reg Bongo. Problem appears to be with angle of top brackets. I think I need a wedge or something under the top bracket to give me the correct angle. Anybody got any ideas? or fitted said rack before?

you are trying to fit a Fiamma Pro C "bolt on" rack it justs bolts on no worries.