Aston Martin One-77 2010 Owner's Manual page 134

Windscreen Washer Jets
The washer jet housings are located in the area
between the edge of the bonnet and the
windowscreen. Each housing contains two washer jets.
Windscreen washer jets are set during manufacture
and should not need adjustment. However, if
adjustment is required, adjust up or down so that the
fluid strikes between a third and half way up the
windscreen.
8.10