hwo to know which cable plugs into oxygen sensor, same plugs on both,gm

Question

I unplugged both cables to the oxygen sensors to change them to correct p1133, now I do not know which male/female belong together, they look alike and in the same area on bank 1
on my 2011 gmc terrain 6 cylinder. Thanks..Mike.

Answer 1

I could not see a picture for the 2011 model but here is a picture of the 2010 model (see picture below)

 

^ Bank 1 sensor 1 

^ bank 2 sensor 1