Here's how mine is wired. This diagram was for a Lee pot obviously but the wiring is the same. I did put a switch on the hot lead to shutdown all the power to the pot and pid. I use an SSR and don't have any issue with my shop lights flickering (maybe because they're led). Everybody will have a little different way of doing it, mine works for me. I used the pid shown in the diagram. Look it up on ebay, the pid, ssr and thermocouple was 30 something dollars.
pid-wiring.pdf