No need - it's already wired to the line (hot) side of the timer.
Does the conduit exiting the left side of the time box run to your SWG?
If so, the SWG is wired to the load (switched) side of the timer.
Does the pump run 24/7 or does it switch on/off daily?
If the pump doesn't run 24/7, you need to add the ON/OFF timer cogs onto the timer wheel to cycle the SWG off during times the pump is off. The SWG flow switch is a secondary safety device - the timer is the primary safety device that turns the SWG on/off. Many of us have the timer to power the SWG on 30 minutes after the pump starts and power the SWG off 30 before the pump shuts off.