I left work order in car, don't have serial atm for machine, old started wouldn't engage with flywheel, changed starter, no ground wire from starter to other side under the mast controls looks like bolted onto engine, half way through wire, it's open under some heatshrink and glued to other wires, can i just replace ground wire, or does this have to be connected back to these other wires, no diagrams available to see where it goes.

Any help is appreciated.