There are at least 2 styles. a 89?-92 style and a earlier version, there may even be a 82-84 setup. The first 2 pics are of my 85 iroc, that should be the same as your style, with the nozzels on the windsheild cowl. The last pic is of my 89, with the nozzels on the wiper arms themselves.
'85 drivers side

'85 passenger side

'89 pass side wiper arm