This showed up on the FB page yesterday. Creed Hostetler responded when the new owner asked about what they were:
Creed HostetlerHello
 - One is an inlet and one an outlet for the glycol lines of your Alde 
system. The service-center will use them when changing the glycol. They 
should only be opened when the glycol is being changed at your 2year 
mark.
So, the Engineering Department has been on the case.
                   
                
2017 Outback
Towed by 2014 Touareg TDi
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