Bottle washer caps

Those are for the 2002 and are much smaller. I owned a brand new 74 2002 and the hose never went into the cap, same with a 76 and my one prior owner 69. My friend who is the original owner of a 73 Tii is the same, no hose in cap.
 
So then why do those have a hole in them and the parts diagram shows the hose splicing off for going in the cap? Confused.
 
If the choice was

a hole, no hole, or a black cap, which one would you pick?

Mine has a hole, no hose. But at some point, I'll want a new bottle.


Right now first order is I'm chasing a pesky oil leak on the upper timing cover that suddenly decided to spring a leak after two years.
 
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