LWH,you lucky chap,on the bike while the rest of us are slaving away at work.
The easiest way to look at the airbox is to turn the handlebars to full left hand lock.You can then look down the tank through the gap caused by the moving top fairing under the bars.Its easier if you have a small torch,like a mini maglite or similar.
As I said before,the restrictors are oblong spouts with small oval holes in them.They are either side of the "Ducati" embossed on the lid.If they have been removed,all you will see is a recess with a large oval hole,the air filter will be clearly visable.
[Edited on 7-11-2003 by keefyboy]