Making progress but had to use a different top case, the Givi E360 just didn't have enough room and the curved walls made locating a place to mount the inlet and vents difficult. So, I picked up this Kappa KGR52 which is Givi's Italian version of the Trekker. Pretty much same case except doesnt have the quick access door like the Trekker.
The inlet installed pretty easily on the bottom. I used aluminum supports on the inside to stiffen up the mount to the case floor. I didn't want it flexing the plastic and causing fatigue. It doesn't flex at all.
Here's how the J1772 plug attaches.
Now, I need to do some wire routing cleanup, get the top vents in, and drill exit hole out the front for the wires that go to the aux port. This pouch will cover the exit hole and store the cable. This will mount on the case under the passenger backrest.