If this was my company I would go over my standardparts and review the process/requirements of using/implementing them in the design/manufacturing process. To me the fitting here is a standard part (muti/frequently used) and as such I would in the fitting part add the connecting information for the pneumatic line and add it to a routing RefSet. This would be used to associativley connect the pneumatic line to the fitting.
I've worked on a handful of assemblies where we needed to route wires or tubes without a routing license. We essentially did the same as what @TimF is suggesting, we kept a line or arc in the fitting component and used that as necessary at the assembly level. We often moved the geometry into a "routing" reference set so that we could turn them off easily and tidy up the assembly display when we were done with them.
@cowski, (et. al.)
Neither us nor any of our customers (think all of the Big 3 and then some) use any of the Routing products for our models and we're both (us & customers) modeling piping all the time. Not saying that's the definitive way to go either - just throwing that out there for the sake of comparison/info.
NX 22.214.171.124 MP11 Rev. A
GM TcE v126.96.36.199
GM GPDL v11-A.3.6
While I couldn't find any existing ER's based on your original question (line normal to surface where point is center of hole) I did find some existing IR's which reported the same issue. One particular IR had the following explanations from development: