This is where I got mine.
https://www.amazon.com/Briggs-Stratt.../dp/B005F6P838
Two ends go to the armatures, the single end goes to a spade connector on a stud mounted on the blower housing, right side of the engine inside. Outside, another spade connector the tractor engine harness connects to.
If you don't have the engine harness connected on the outside, you can't ground the armatures to kill the engine.