Where to place an swcg

You have to replace the leg from the filter to the valves that has the puck chlorinator. You can make a loop up or to the right for the SWG. Which works best depends on the cell you are installing and what is unseen off to the right of the picture.
 
It may make sense to rotate your filter so the inlet/outlet point fully to the right. Then you can come straight out of the filter, make a 90, and have a straight run to install the cell into the valve.
 
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