Agreed if it’s external, one or 2 wipers parked on the side I think is the most likely config. However, a retractable box, at the top, would be the most efficient for aero, but likely not the best for mfr.
Or it read all the tweets about the Cybertruck and my suggestion for hiding the wipers at the top was one of them. Try asking if the seats are removable.
People; read the NACS doc, it's free to download, brief, and clear. AND it answers like 99% of the speculation here. https://www.tesla.com/support/charging-product-guides#NACS-resources
There is also the oil pump that has to run if the wheels are turning.
And in truth; while nothing is "frictionless" in this/our universe, we can all agree these drive trains are pretty low for obvious reasons.
According to the NACS doc, the port will be the same for v1-v4 charging, the cable and handle have slight changes to prevent arcing at high voltage. What it is (assuming the engineering is done) vs what can be is the rub.