Vigier Guitars

Hello everyone!
Some time ago, the original switch from my Excalibur was replaced by a tech. After that, it lost the factory third switch position configuration (bridge+neck) resulting in the center pickup alone instead. Now, I'm trying to reinstall the original one using the supplied wiring on Vigier's site, but I haven't been able to make it work. I can't see the correlation between the schematics and the actual switch.  (I attach a picture for further explanation). I've tried numbering the terminals in the traditional way (A1=1, A2=2, A3=4, A4=4, B0=5, B1=6, B2=7 and B3=8), but I can't make it work. I've also tried inverting the numbering with the very same result. So... could somene explain to me how to translate the numbering on the schematics into the physical switch? Apparently, the fourth terminal on the left side wasn't used, because it has no signs of been soldered. (I've circled it in the attached picture).
Thank you in advance for your help.

You have to use a Schaller Switch MEGASWITCH-E ref 15310002

1Patrice Vigier wrote: You have to use a Schaller Switch MEGASWITCH-E ref 15310002

Thank you sir for your swift response.

Speaking of original wiring, is the only way to get some the second hand market, or is it manufactured? Or is there a recommended equivalent?
And in any case, is there a shop that stocks it in Eastern Europe? Because I live in Russia now, and later on, plan to move to one of these cottages in Latvia, and thus would like to avoid struggling with expensive and slow shipping from North America, if possible.