I found the Ford video on youtube to be generally accurate, except- I found it easier to remove the 4 Torx bolts on the seat rails and tilt the seat up forward and out of the way- don't need to unplug anything or completely remove the seat.
Take the sheet metal then plastic battery covers off, disconnect battery cables then lift out.
Ford battery video- https://youtu.be/aEvOz5HKiiQ
Take the sheet metal then plastic battery covers off, disconnect battery cables then lift out.
Ford battery video- https://youtu.be/aEvOz5HKiiQ