See also in the Sportsterpedia:
Here is a pic of the internal reed valve on a 79 model on the left.
You can see the 10 o-clock fitting and the 6 o-clock fitting both enter the same cavity.
The oil slinger is the big fat washer on the end of the generator in the (R) pic below.
6)
Here is a 1980 XLH with the 10:00 fitting plugged and the 6:00 hole being used to vent the crankcase.
8)