Air Intake: hose connections and intake duct
 

If your used UK-spec R3 came with an after-market CAI and you wanted to return your car to the standard air intake system and had been given an air box and air hose, supposedly the original ones, but no fresh-air intake duct to the air box and the air hose had 3 air connectors just like the earlier 231:

• Does the R3 air hose have 3 small air connection ports just like the earlier 231?
• If so, what does the lower one connect to (the one that the 231 connects to the oil filler tube)?
• Does the R3 hose to the oil filler tube go to a different place than the earlier 231 and, if so, where?
• Is the R3 fresh-air [intake] duct similar to the earlier 231?
• If not, would there be any noticeable difference if a 231 duct was fitted?

A quick response would be appreciated (in this hypothetical case, the car might need to be restored to stock quickly!).

Cheers, all