Just to help widen your search, you can buy any Ohme Home Go or whatever you like to call them (the name seems to vary, even on their own web pages).
You can then have the wire changed or otherwise fit some cord with a 3 pin plug to power the device up.
Once working you can contact Ohme and get them to make a change (over it's 3G / 4G connection) to set it to charge at 10 amps.
I would join some smaller flex to the existing cable to retain the IP rating but see separate threads about water ingress. That way you don't have to disturb the label which has connection details you'll need.
There is one on ebay right now actually...
Find many great new & used options and get the best deals for Ohme Go Smart EV charger - Type 2 5 Meters - 3 pin Plug at the best online prices at eBay! Free delivery for many products.
www.ebay.co.uk
HTH
Gaz