Nothing is ever easy is it. The question is have they colour coded the correct pins, in which case all you ould need to do is follow the colour coding i.e. white/orange - pin 1, orange - pin2, white/green - pin3 and green - pin 6. my guess is that its 1,2,3,6 on the left hand side bottom to top
Thinks I would be very tempted to con check them with a meter first. pin 1 should be the far right of the bottom (rj45) plug as you have photoed.
Rickity