[BB_TX]

You are making some progress. The solenoid clicking does indicate it is working mechanically, maybe not electrically. Since you have 12 volts on the center terminal, have someone actuate the extend switch and see if you get 12 volts on one of the side terminals. And the retract switch to see if you get 12 volts on the other terminal. If you are getting voltage to both then you will need to move to the pump motor. Motor may be bad. Or it may have a bad/loose ground.

Those solenoid terminals appear to have corrosion on them in the picture. You might lift each wire and clean the studs and wire lugs.

On the left breaker I think all you will need to do is move the short jumper wire to the empty stud leaving the other wires where they are. That breaker may be bad and why someone bypassed it rather than replace it.