The one on the bottom is just for 115v power to the AC/DC power supply, the 3 way toggle is for the valve as on-off-auto (on depending on float switch position)
I was tired of trying to balance two valves during the final sparge/transfer into the boil kettle. So, build a little electric based valve control system. A simple on-off-on switching power to a stainless float valve and motorized ball valve.
Here's an example without water
MATERIALS
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Funny enough, I just built this for my mash tun during final transfer to the BK to keep water above the grain bed. But it could probably be adapted for the BK.