It's simple- - - -remove both hoses and attach a vacuum gauge to the pump nipples with the engine running. The one that pulls a vacuum goes to the wipers. Connect the hose from the intake manifold to the other one. You've got a 50/50 chance of being correct by simply attaching the hoses at random, but it's easy to do it right.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!