Hi guys, a mate of mine fitted my Weitec Ultra GT suspension kit recently, and i noticed today that one of the springs is the wrong way around... but don't know which one!

LEFT SIDE

RIGHT SIDE
Which one is upside down? Also, what impact will this have?
Also, i had no break noise whatsoever, but now after fitting the suspension and wheels my drivers side front wheel squeals when i break. Any ideas why? I understand that a lot of cars "just do", but mine didnt beforehand, so any advice to solve this would be awesome

thanks guys!