Bavaria 40: Wiring for electric flush toilet aft port?

[Krumelur]

I'm going to ditch the manual Jabsco in the aft port cabin and want to replace it with an electric one.
Currently considering the Jabsco Quiet Flush Comfort (but open to other - more silent? - suggestions).

Reason for my question is however: does anyone have a recommendation for wiring up the system?
Starting at the batteries under the seat area, where would you run the wires? Fuses? Use one of the unused F2 - F5 switches in the control panel to turn the toilet on and off?

[sean c]

I recently put that model in to replace a manual one. Very happy with it.
I wired it up by cutting in to the wires used for the shower sump pump as this is in the same head. I figured you would not be using the shower and toilet at the same time so just need to ensure wires are correct size for the new installation. Need to turn power on to the shower to use electric toilet.
sean