On our C/S there is an auxiliary air connection in the 1st passenger side cargo area and a 2nd in the engine compartment. A number of threads have been started with additional information, including a recent one with pictures of a "multiplier" to increase pressure along with pictures showing the mounting configuration. I know I cannot use my compressor on the 365's up front, they won't fill above ~110-112 but the 315's on the tag and drive axle can be filled to the correct psi.
You should be able to top off your tires using your compressor if they are 315's/295's. Run it at high idle.
John & Maria - Chester (furry kid)
2017 Cornerstone 45B - FMCA-#489135
2012 Scion XB - Pushing hard