YotaTech Forums - Wiper question

I just had my windshield replaced in my '04. The installer said the wiper arms were backwards. I never noticed it. But he switched them. This is like my 3rd windshield, so another tech might have done it. My question is, how can I tell if this was the case. Does the longer wiper go on the driver's side? To me, both wiper arms look identical, just he blade are different sizes.