The final component from the cheap eBay quad/scooter wiring loom. It's the key switch that is mostly a visual deterrent to the casual thief.
Before opening it to look at its construction I decided to do a "lock picking lawyer" and have a go at picking it first.
Here's a link to the lock picking lawyer's channel:-
   / @lockpickinglawyer  

A professional would bypass something like this very easily at an electrical level.
One of the best things to do for security could be adding a simple hidden switch across the kill circuit elsewhere on the bike. Even with the key switch bypassed or unplugged, the bike would only be able to be started by turning the secret killswitch off.

I'm almost sad that I've taken apart the last component on the wiring loom. It was a lot of fun reverse engineering all the components.
For those asking about the cable, it does appear to be copper, and while not being a high current wire (other than the starter cables) it is probably adequate for the job.

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