Thanks @Peter_P and @dark cloud for confirming my understanding that the extended hose doesn’t terminate downward enough to directly drain to the ground. I think the DIY done by @beastman is the correct way. Unsurprisingly, the Tesla's extension method looks like a haphazard job to me and that they like to deposit the drainage, if not directly at the components, but somewhere near them and eventually on the top of the bottom tray at best !!! And here we are complaining about the early model S cars ... look at the AC drain line of Model 3. No lesson learned.