I just confirmed what Dan noted. The  lower one in your photo is for the rear wiper, not one of the fronts. 

> On Feb 2, 2020, at 2:01 PM, Alistair Bell <albell@SHAW.CA> wrote:
> 
> Sheesh, I’m not very observant. Taking apart a spare pair of wiper arms for blasting and powdercoat, noticed they are different lengths and different lengths between bends. All these years and only now saw this :-)
> 
> Pic
> 
> https://shufti.blog/
> 
> Alistair