Rsk I'm after some brackets that you have used to fit the lights to that cross piece of the sports bars in your first photo. did you make them up yourself or buy them?
Here you go mate 130Ah AGM under my tray, I made 2 bits of plate to hang it through from the tray. Left some length in the cables just incase I need to move it for any reason.
Mate I have got the same car as you and like you said theres no room at all! You could do what I did and make a custom tray underneath the rear tray. I mounted a 130Ah AGM battery under there and I'm real happy with it. Only thing is if it ever shits it self you need to take it to someone with a...