Can I go out the filter then straight up rather than the tilt that was done? I was thinking out the filter straight up and install saltwater generator inline vertically there then go across to the jandy? One other question, my aux pump for my polaris has a removable connector hose for easy replacement should it fail and is on this plumbing so it needs to be moved. do you deattach/reattach it with a pipe wrench or hand? Do you use plumber tape when reattaching, this is the other component that im unsure how to connect.The RJ60, unions and flow switch will total 20"...that looks like it might be pretty tight. I know you don't want to do too much replumbing, but I would consider just redoing the plumbing from the filter to the Jandy valve, then you basically have unlimited space out to the left in the photo. The Jandy valve might still be able to take a 2" pipe inside of that port...if not you could get a fitting that goes inside a 2" pipe.
You can install the SWG in any orientation. I thought it was suggested to have the flow switch oriented so that the water flows up through it, but I couldn't confirm that in a quick search I just did. Circupool makes a vertical install kit that you might find helpful:Can I go out the filter then straight up rather than the tilt that was done?