I wanna thank all the people who post comments on how to do things . I just did the coolant change for the inverter and engine coolant , with all the knowledge of the people here , it went flawlessly . special thanks to Chapman and Nutzabout Bolts . Filled the engine coolant to the "B" line , put the cap on , put in maintenance mode and damn if it didn't go right to the "F" line after like 30 minutes. , My car is a 2012 Prius 3 with just 66700 miles on it so I figured after 11 yrs it be a good idea to change the coolant . Again thanks !!
The engineers should maybe have made it wind up just a smidge high or low, so it wouldn't seem like they were showing off.