Help with a build

[PirateShiner]

Hey all I’m in need of some help.

I am in the process of putting some upgrades on my vevor still. I’m switching out the crappy flex lines with copper pipe and better attachments.

I’m ok soldering pipes together but I’m not 100% sure what I should how I should attach my threaded connections to my pot lid and thumper. I’m using 1/2” pipe and matching connections so do I solder them in place or is there another process. I’ve seen stills upgraded like mine but I can’t see how they are attached.

Thanks for the help