The easiest way to fill it back up:Not looking forward to this.
Did you fill the fluid to the top then run engine and top it off?
What did you use to pump the fluid back in?
Drill 2 holes in the lid of the ATF jug.
Insert two lengths of 1/2 poly tube. One just barely inside the lid, the other pushed through the lid to reach the bottom of the jug.
Set your air compressor to less than 10psi, blow gun attachment. Connect the tube just barely inside the lid to the blow gun.
The tube at the bottom of the jug runs to the fill port on the transmission.
Squeeze the trigger. The 5-10psi puts air pressure at the top of the jug, the fluid tries to escape and is pushed through the hose into the transmission. You can fill all 7qt in about 5 minutes with zero effort.