Here is a link to the presentation PDF and a couple other helpful links.
Presentation
https://www.amazon.com/shop/k8mrdradiostuff
https://www.youtube.com/@hamradiotube/search?query=Battery%20Box
These are guides only. We are not responsible for damage to equipment, life, limb or property. If you don’t know what you’re doing, either don’t do it or get help from someone who does.