where can i find a wireing diagram for my motor . 50 pm blue band motor serial # 8056080.

just trying to see where the extra earth wire goes to . on the starter solinod. its a eart wire from the top front of top cowl cover. just want to know if it neads to go on solinod or not as it was removed and not marked. all other wires were marked where thay came of .( let my old retied farther remove them and befor i could say mark it it was removed ...
im gessing ive just got to find the earth side of solanod and place it there . but question is dose it fit to large earth wire (going to starter motor ) or the the other small earth wire that goes back in to wireing loom?.. or dose it matter where it goes at all or not.......

any help would be very much appreciated.