I am now happy that I can make the plugin work. A strange behaviour is that when I press ESC after having drawing several points, nothing happens… So I need to manually click on the button "Draw wiring" to untoggle it, then it finishes creating the wire.

I do not have any idea of why…

For information I am on archlinux, SH3D version 7.5, last version of plugins Wirings and pan3dview.