Washer hoses

[Red rooster]

So just bought a mk2 galaxy for summer camping, the lady I bought it from said the window washers had stopped working, so checked the fuse all good, next stop the pump, here I found the pump had been disconnected, plugged it back in filled up the reservoir and ho yes it started to  rain blue rain in the back of the car, I think there is a split in the hose checked the ends of the hoses all fine, so I have a horrible feeling that the leak is half way down the roof, my question is has anybody replaced this pipe and is there a way of doing without dismantling half the car interior 😱👍