Your Redhawk might be mislabeled. What I would do is trial and error: With your RV water pump off, hook up site water to the one labeled 'City Water' and turn it on. Then turn on a faucet in your RV. If water comes out, your labels are correct.
If not, that one is the black tank flush.
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.