Great mod but don’t see instructions to modify reverse shifter?

[dreammachine]

Here’s a great mod for shifting from reverse to neutral to drive:

https://youtu.be/lZW-gIfoEGI?t=1746s

Not sure where to find the instructions though. Has anyone tried modifying the shifter this way?

 

[gkamer]

 

[gkamer]

Here's another option if you're feeling adventurous.....

 

[dreammachine]

Thank you sir