No, this item is for EDGE-Series models. SJ-Series parts can be found under Home >> Replacement Parts >> Parts & Accessories >> SJ Models.
Based on your description you may want to consider these two parts:
https://www.circupool.com/CircuPool-SJ-Series-Threaded-Cell-Collar-Cap_p_233.html
https://www.circupool.com/CircuPool-SJ-Series-Cell-Cord-Connector-with-heat-shrink_p_232.html