It's best to not solder automotive wiring due to vibration. Check out HP Academy's free intro to motorsport wiring before you get started on your truck, it has a lot of great info. I wish I'd found something like this years earlier.
https://www.hpacademy.com/introduction-to-wiring/
We have these and have done multiple AAW installs with it.
https://www.amazon.com/Tool-Aid-1896.../dp/B006O1Y1FY