HOW to test a STARTER MOTOR, DIY wiring diagram, and troubleshoot EXPLAINED

just an idea on how a starter motor is wired up and how to BENCH test it my other channel shed FLOOR build: https://www.youtube.com/watch?v=93mD8slVAbM&t=8s my other channel shed build: https://www.youtube.com/watch?v=ARWJfjiQiqk&t=28s