You have no idea what you're looking or for, and
@Dannyboy485 is confusing you by showing examples from him working on big transport rigs. What he has shown you doesn't exist on your vehicle.
You asked if the seat wire and NOx sensor wire were in the same harness. They are not.
You asked if one can short the other or if it's conincidental. A couple of us told you that they are unrelated.
About knowing where the fuses are... Look at your owner's manual. It should tell you where fuses can be found.