well the mk5 wiring loom you should be able to find in a haynes manual and if you go on there website you might still be able to get the s2 manual as well, they will be your best option because i guess you putting a s2 engine into a mk5 fez and the hole load of diagram's will let you deter where the wires are all going after the engine bay/dash and through the car and clear up any loose wires you might have