www.seaflo.com/en-us/product/detail/3232.html
www.seaflo.com/en-us/product/detail/642.html
I took a few liberty's with their info/pics, not sure how *intelligent, but..........See first drawing below.
*Personally.......I think it's always much safer to wire the auto wire(brn/wht) directly(through a breaker/fuse) to the batt positive and only switch the constant on (brn) with a SPST on/off switch to batt positive.....To do this and keep/use the hardware you've already bought, see second drawing below with "jump" wiring.......It'll always be in "auto", much safer IMHO.
With first drawing and as this/some manu's suggest, just don't think it's too safe to be able to accidentally leave the auto function in a "off" position as per the manu suggested wiring of their float pumps seen in the above link with their switch..........To me? That's like giving users a easy access on/off toggle switch on a co/smoke alarm, not good!! That auto feature is too critical and should NOT be able to easily be shut and/or left "off".