Plug all 4 leads in- start motor. If it runs like poo, swap leads. Repeat until the motor runs smooth:shrug:
 
or you just get some one helpfull like me and it goes in the order on B,A,D,C

B runns to the far left on the engine (PLUG1)

A runs to the next on going to the right(PLUG2)

D runs to the right of A (PLUG3)

And finally C runs to the 1st piston on the far right side.(PLUG4)
 
Thanks a million adam, much appreciated!!

youre a legend
 
no problem mate. it only took me 3 minutes max.

if you do something like that, dont just plug and play like what the guys above said, its worth double checking to save problems :D