I'm replacing the pig tails on my injectors but I can't figure out which wire is supposed to be on the left and which one on the right. 3 out of 4 injectors have the red/yellowish? Wire going to the left side of the injector and the green/blueish wire to the right side. The 4th is the opposite for some reason so I'm wondering what the correct way of wiring is.

this pic might help...



I took this awhile ago, but it hasnt changed since then and she runs great.
Kind of hard to see, but the #4 injector is wired the same as #3.

Oh ok so the wires between 1+2 and 3+4 is supposed to be different colors. I wasn't sure if it was color faded or what.