The Dispatch | Expert | Scudo Hub

Hi,

How do i disconnect the speedocable from the gearbox?
Do i pull out the pin with the red arrows as shown in the picures?

Or does it have to do something with the spring thing shown by the green arrows in the pictures?
And if yes, can i just pull it out and the spring will give way?

Also, what is the black box  attached to the cable setup?
Looks like a sensor of somekind.

I can make some guesses as to how it works as can be read above but i would like to hear from someone who has actually done this before.

Thanks!