I ended up ordering the maypole. I connected it via the bonnet and closed the hood just about not fully using the croc clips. Ill take a photo later on.
It's ok mate I dragged my ar5e out to garage and pulled my boot apart to have a look so I can hard wire a permanent tail with plug on.
It turns out that 3 core flex can be fed into boot at the top left or right corner as the glass has section that is cut wider. ( But obviously only using 2 wires of the 3, the yellow being snipped out of play)
This can accommodate the flex, the rubber boot seal squashes and the flex can be pulled easily, not tight so, it's not being pinched.
Hope that makes sense.
It's all in the design process at the minute,and will get pics up when it's done.
But basically, decent wire soldered to crimp terminals, one on battery +, one on boot floor, around 60cm of flex, (maybe more) coming from here with a Tamiya style radio control car female battery connector soldered on, all wire tie wrapped so secure and out of the way should I need to get to space saver, and about 50mm of tail protruding from right hand side of hinged boot floor.
(This can be popped back inside when not required)
When the maypole arrives, I shall solder the other male Tamiya style battery connector to some decent yellow weather proof flex of around 2 metres then solder that to the feed wires on the maypole permanently.
Like I said will post pics up when complete
So basically all I do is park car, open boot, plug in, close boot, close garage.