I installed (followed directions) the electrical wiring for the SWCG power unit to some of the same posts that the pool pump was wired to in the timer.

The timer turns the pump and SWCG on at the same time. The SWCG computer then runs the cell according to the Sanitizer output settings (20%,40%,60%,80%,100%) on my IntelliChlor IC40.

From Pentair IntelliChlor manual. Power Center = SWCG power unit.