Question Regarding 2 holes

mdunn

Petty Officer 2nd Class
Joined
Oct 7, 2007
Messages
186
This is on my 2001 F115 but I think common to many other models.
I've looked in my service manual but not found what the two holes are on the mid section, back side between the crank case oil drain hole and the upper cowling.
The lower hole is round and the upper one rectangular.
I should know what their pupose are but don't.
Thanks in advance.
 
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