Hi mate welcome to S.O.C
Very nice looking hatch hopefully be able to get the problems sorted out. So feel free to join in on the threads great freindly bunch on here :)
I know on the newage it's on the passenger side behind the windscreen washer bottle a little bit further back towards the back of the engine bay on top.
As said above. If it's a leak on the rad I'd almost put money on it being the bottom hose or the bottom corners. Fingers crossed it's just the leak and not a Head Gasket :(