No factory job required, David.

The old style plug is still there but hidden within the plastic casing.
You just need to unscrew the plastic cover ( both Rx cover and switch cover ). Then remove the plug from the IC board and open it by pressing the side tabs ( gently of course ).
Replace the old ribbon cable with the new one.
Be careful with the polarity and make sure that you clamp it properly: each fork shall punch through in between the cables of the ribbon or you might have a shortcut.
When you are satisfied with the position of the plug forks, finish the clamping with a vice.
Plug back into the IC boards and close the casing...