Putting it all together.
I placed the rubbermaid container in the bottom of the seat., drilled a hole in the to to allow the cod and hose to run through. I pulled the seat away from the wall and drilled a 3/4" hole through the lower side of the booth frame to accomidate wire and tubing.
I mounted the
PVC to the wall, and ran my 12 volt wire from the relay to the switches, my tubing, my extension cord (the outlet is behind the tank) and an extra 2 wires just in case I need them later.
I mounted the junction box and wired the relay.
Here is a photo of the final under the booth seat.
I then mounted the
sump sensors, here is a photo of them. The other switch is partially blocked from view by the
skimmer.
I used silicone on the wire nut connections in the sump area...better safe then sorry. 
And then I plugged it in and gave it a test. As you can see, when the float is down, the water runs in!
After 24 hours the
sump was at the exact same level. It works like a charm. I don't have to look at a doser pump, constantly adjust the dose, see a bucket in my bar area and the reef is more stable....we ALL win!
