Some more photos of the basic layout.
Another mystery is figuring out what the seat bases looked like. As you can see in the these two pictures the seats were mounted to the floor using three bolts. However these mounting points are outside of the normal CMP seat base. The manufactures part number is B340056
There were two battery trays on the truck with the following manufactures description and part numbers.
Stand Batteries Assy, RH #C38272
Stand Batteries Assy, LH #C38273
As you can see there is a couple mounting holes on the floor. Highlighted via the red arrows. On the left side is a larger oval hole. This was for the power cable from the Chorehorse to come up to the C5 charging board. It is highlighted with the green arrow.