I’m not 100% sure but I think that is the wrong type of washer jet, I hunted for ages to get 1 for my brothers Mk2 Storm as I could not find 1 new as his was missing, I think the Mk2 Scirocco jet is a slightly different shape and slight higher compared to yours in the picture.
Mk1 78 Scirocco GLS 1.6 FR, weekend toy.
Mk1 88 Golf GTi cabriolet 1.8 DX. Daily drive.
Membership No. 323