Welcome to the forum and congratulations on the new Precept.
I'm not sure of your vehicle (and can't tell from the online photos), but usually there is a series of openings in the outer rim. One of those openings should line up with the inner tire valve stem.
If that is the way yours are, you'll need an extended tire pressure gauge to reach the inner valve stem. An extended metal end for the air hose will also been needed to inflate the inner tires.
If none of that makes sense, a trip to your dealer or to Discount Tire should help. Of course someone with a unit like yours may be out here somewhere.
Sherm & Terry w/rescues Steve (std Poodle) & Eydie (min Schnauzer)
2015 Jay Flight 27RLS (Camped: 102 nights 2015, 90 nights 2016)
2006 Ford F350 6.0 PSD, Lariat, 4WD, CC, LB, SRW, auto., Camper pkg.