sc252 electrical

Please help any info. Would be great new operator, new machine to me. Ran the grinder for about five hours everything worked perfectly. Shut it off for about 20 minutes and did not want to turn over. Jump started it and ran fine but cutter head would not engage? Low battery voltage? When it runs...

I have a sc252 that i just rebuilt the ch730 (i believe) and got running.. except all the wireing on engine is missing.. only thing left is harness from fuel/hydraulic fluid box with hour meter, clutch engage switch left on it cut off near engine.. any help or schematics would be amazing.. ive...