I am trying to replace the 12v battery on my C-Zero as the RAC tell me it is faulty. It should be straightforward but on the positive terminal where the red plastic fuse box is, there appear to be two nuts holding the connector in place where I was expecting only one. There is one on the terminal itself but there is a second nut which appears to be part of the red fuse box cover - is that supposed to be removed too? With one nut removed the connector appears to be firmly in place and I am reluctant to try prising it off, so it looks like the second nut is holding in. Not having done this before, I don’t want to mess it up. Having got a Yuasa YBX5054 battery, I thought this would be easy but I can’t find a YouTube video on the C-Zero or iMiev that shows what to do and the Go Green Autos post doesn’t help! Any suggestions please?