The spare tyre kit is a really good option in my mind.
Not many cars offer the facility for carrying a spare wheel anymore, so because the ZS EV can, why would you not ?.
I have coiled my not very often used, type 2 lead around the space saver wheel.
The only thing you will not be able to fit under the boot floor cover on its lowest setting, is the Granny lead.
You could put that in one of the side netting sections ?.
To be honest, I don’t bother carrying my Granny lead around in the car, unless I am travelling to a place where I know the charging infrastructure will be poor.
Go for having the spare wheel, because why not ?.
Could save a LOT of time standing at the side of the road waiting for a break down service.
No point in carrying the inflation pump or the sticky stuff they give you !.