Check transmission oil on a 2000 Chevy Malibu?

The 2000 and several other years of this vehicle have no transmission dipstick because they use a sealed transmission. The actual process for checking the trans fluid is elusive as I have been searching for days. The popular answer is that you need the vehicle engine and transmission at operating temperature, on a level surface, and then you pull a small plug (location in dispute) near the right axel shaft and watch for a small amount of fluid to run out. If none does, then it is low. Best I can come up with so far.