@UWDawgDiver looks like you gave a host of good answers thanks to Akimbo.
My 2 psi, if you are willing to go with a cap to protect the schrader valve, you might as well go with the air nozzle, same function with more options.
Routing is up to you as already pointed out. Mine is clipped to my left chest D ring so I can readily grab it with my right hand or left hand if needed. Depending on the BC I use, I sometimes route through the gap between the wing and plate then under my right arm. It is tucked away this way. Also, the available port on my Sherwood is facing straight down.
As I tell people who see this setup and are are curious, I say "you have the ports, use 'em"