Thanks to Kansas and Rockfodroo for a brilliant solution!
This .90 cent adapter stolen from
My sprinkler head spare parts does the trick. Hand tighten and go!
Take off the shower spray head in the water bay as Rock suggested.
Add this 3/4 to 1/2 nylon male to male adapter. To the shower head hose.
Screw the 3/4 male end into the fresh tank refill.
Place your 5 gal Aqua container outside your winterization bay and turn the three way to suck water out of the jug.
Go back to your water bay and turn on your cold water faucet from outside. And turn on your pump.
As advertised, the pump sucks up water from the jug into the lines, pressurizes and feeds the shower hose that fills the fresh tank.
BRILLIANT! I love u guys!