Repro kill/horn switch

The reproduction kill/horn switch arrived yesterday. I ordered it from Danell at SPD. She told me that it is a quality reproduction piece in comparison to a lot of the not-so-good stuff available.
She also said that the back plate was thick and solid. This plate is split on half on my original, hence why I need this one.
I purchased this for $34 with a 10% discount. Most shops had it listed at $39, but I saw ScooterWorks had it at $25 and when I check again it was $35 or something.

It is my intention to re-use my original chrome cover for the switch if at all possible. Trying to preserve the soul of the bike as much as possible.

This is the first step in getting this bike diagnosed for (1) electrical issues and (2) not running correctly, Paul S. says. Since my original switch back plate is broken in half it is grounding it out.

It is super challenging to find NOS for this piece since all 1960s Vespas used it.