Hi John, I look forward to digging thru either the car or the service manuals (I kinda hope the manuals get here quickly - I want to drive the car not tear it apart to explore!)
The motor and inverter are all that's needed to handle both power and regen. The charger might use some common parts but should be a mostly stand-alone system. The US Electricar system, for example, uses the controller to invert power for regen, has a separate charger board, and uses at least some of the motor windings as a power transformer when charging.
Thanks for the power steering info. That makes sense, and fits much better with the underhood picture. The video capture I pulled earlier was from the left and the 'drivers side' coolant bottle was partially hidden. The new picture (thanks again Quixotix!) is from a more direct angle - and it looks like both coolant bottles are exactly the same - same full line, cap, overflow, main-line location, and mounting tab. Hey - I'm good with not doing PS fluid changes!