Here are the components for air filtration.
Insert the long bolt through the hole in the cast elbow as shown until the cutaway on the bolt head sits on the flat stopper on the elbow.
Push the rubber gasket on the the elbow, followed by the air filter itself, then the end plate and the wing nut to tighten.
Insert the filter setup in to the air box and tighten the jubilee clip where shown. Don't put the fastener on the outside, it will catch on your sidepanels.
Use the wire clip to fasten the rubber belows to the carb.
Use washing up liquid to slip a 1 inch length of plastic wire cover over the wire clip of the air filter spring.
And push them up to the bends where shown. This prevents damaging the paint on your filter elbow.
Fasten the spring clips.