finally got a spare hour to take the interior panels off over the drivers side rear wheel arch!
found the right angle join, eventually! once i'd removed the centre panel (around the boot door catch), then the panel up the side and the pice which the parcel shelf sits on!
plugged it back in, engaged the wiper, boot lid cover full of screen wash!!!
so off that comes and in the process, broke some of the clip locations on the inside of the cover, SEAT didn't make it easy to remove this cover, but probably did enough to warrant quite a few after sales of this cover panel through breakages!
plugged the hose back onto the back of the wiper motor, engaged the wash wipe, nozzle blocked!
so after a couple of hours in total trying to rejoin sections of this hose back together, at 3 places in total, it still ain't working yet!!!
any body know the part number for the little plastic nozzle bit with the jet spray hole that locates in the hollow bolt which holds the rear wiper arm on??