That is a tricky question as the stick is completely closed up...
The stick needs to be open and taken apart and the "arch for the elevator/throttle" needs to be swapped between the 2 sides...the plastic might be bridle so you need to be gentle on the screws! The peculiarity is that the stick have centering spring on both sides and that cause the need to attack both sticks!
It's not rocket science but it will take some effort and it's not that trivial.
The Boib Dunham sticks are extremely compact thus uses a few unconventional solutions.
To what I remember Cannon didn't had any failsafe settings so you don't need to remap the channels however failsafe on throttle is a requirement almost everywhere in the world!