The connector next to your generator is for the tow truck driver to put air IN the SYSTEM to release your air brakes. It is NOT for airing up your tires. Look on the driver's side above your propane tank. There should be a fitting there with a blue plastic cap on it. THAT is the connection used to air up your tires..at least that's the way it is on my coach...that said, verify what your coach has by calling Monaco direct with your coach number or the last 6 digits of your VIN. They will give you the straight scoop. Another way is to simply hook up an air hose to that front connector and see if it works. The other fitting there is to drain your FRONT air tank. You'll have another one on the driver's side just under the engine where your engine dipstick is......Dennis