To save my sanity, I nipped out and checked while my dinner is cooking. Definitely live with the ignition switch off and wire disconnected.
Btw, I am reasonably competent around wiring, but this had me stumped when comparing with the wiring diagram.
Like you, I'm pretty sure the wrong wire has been used, so will try the one that appears to be switched by the ignition
Before I swapped the ignition switch I checked the wires with the wiring diagram and all was as expected