You should have a single hose running along the body (passenger) side of the
scuttle to centre finishing with the one-way valve. Hose enters at bottom of
valve and exits one to each washer jet via the two top connections. Hose
starts at washer bottle usually passenger's side behind headlights.
All the best, Peter.
700/900/90 Register Keeper,
Volvo Owners Club (UK).
