[vizi]

Assistant tool for calibration.....I made this, not pretty, but usable!:-!

 

[vizi]

Looks like a smart setup - I would guess a 20mm shirt button with 2 holes for the wires and one 'cut' for access to the calibration part ... :-!

Found,yes it's a 20mm shirt button :-d

 

[vizi]

contact points are not where the wires in the button are, if we look at the picture in the manual
how do you know where to fix them

The nominations. Wires= redlus, black:minus

 

[vizi]

Assistant tool for calibration.....I made this, not pretty, but usable!:-!

The final version, mirror the process followed. Thus, the perfect :-!

 

[vizi]

the shirt button saved me

A beautiful shirt buttons:-d