How do I get and show system icon?

I installed SDK connect IQ 7.3.1 to design my watch face for Instinct 2X solar.

I can found some system icon in the document. Ex: system_icon_light__about, system_icon_light__cancel...

(PersonalityLibrary.html in SDK folder)

But I installed different watch face from Connect IQ store, many system icon is the same. ex: battery, altitude, barometer, weather.

I knew how to show system_icon_light__about in my .mc file.

but I could not find the name for  battery, altitude, barometer, weather.

If I would like to show the icon of battery, altitude, barometer, weather in my .mc file, how do I get the system_icon...name? or Is there the standard .png file to let me download?