Salt Water Chlorine Generator

[blonde_b_tan]

I purchased a salt water system (chlorine generator) and have a question that Polaris has yet to answer either in their documentation or emailed question. Is it required that the cell be installed downline from the filter or can it be installed upline from the filter? I have a space issue and plumbing
for installing the cell downline will be a problem. I've attached a photo of the pump set up. Also, can anyone identify what is what? This is a new (to me) home and pool and I am wanting to know all I can about this plumbing setup and pool. i.e. Which way do I turn the Jandy valves when I want to vacuum? My signature will indicate all my pool specs. There are additional eyeball jets located behind seating area in pool. (that will likely explain the Jandy downline from the filter)