As already mentioned, that hose is supposed to be missing...
The pipe in the bottom of the picture is the cold air feed taken from the front of the motor. It runs along the inside of the drivers wheelarch and exits as shown in the picture.
The intake pipe in the top left is where this air is then picked up and fed through the filter and into the inlet manifold.
The reason for the gap is that is allows any heavier particles picked up through the air feed pipe to drop out before reaching the air filter. If you were to connect these two pipes, you would find your filter choked in no time at all!!
When I got my motor, the whole of this area was covered in sandy dust! I would hate to think what state the filter would have been in if it had been fed directly through the intake system!
A snorkel is one route to get around this, but be VERY careful how you direct the intake. One of the guys over here found that his got
very quickly clogged with flies when it was facing forward (made the engine really struggle through lack of air!) and when he turned the snorkel head to face the other way, found he lost performance because he wasn't getting enough air flow!
I'm taking delivery of another L300 next weekend ( :D :D ) which I will be converting to a 'dedicated' off-roader! (stripped out, packed with kit, full breather and snorkel system etc...)
I'll post pics of my 'alternative' snorkel system when I get it done.....should be quite an interesting option to consider! 8)
Regards,
Bruce.