I watched the video from pic rel (https://www.youtube.com/watch?v=bvPP4wZlBUI&ab_channel=MyersMushroomsFarms). I bought everything in the kit link, but my flow meter controller thingy had a different circuit board despite being the same exact model, so I need to do one of two things:
>find the exact same circuit board so I just monkey-see-monkey-do copy the soldering and placement
>learn how my board works and just do the equivalent stuff to mine
In pic rel you can see 'BW-TX004' and '131302', but searching these lead me nowhere.