We have two air fittings on our CC. One in the engine compartment and one in the front basement driver side.
Both will air tires with no electric switch.
However, you do need to match the model of connector fittings so that they connect easily and pass air. There are several styles and each fitting is usually engraved with its model number.
If you are trying to air a tire to more than 105 psi, you really need to start the engine (and its compressor).
If you want a lot of air added, you may need to start the engine (and its compressor).
The engine compressor usually is governed to about 120 psi and has a gauge on the dash.
Some folks find it useful to vacate the engine air pressure to less than 100 psi and then catch the compressor while it is working back toward the 120psi level to get more air to their tire.
With a 120psi air compressor and 105psi tires, it can take several minutes to inflate a tire.