It's done by putting a wrench on the nut on the electric motor. The gearing makes it necessary to turn about 500 revolutions per inch of movement. You could use a socket and an electric drill to speed things up.
Another strategy would be to unplug the jack and use a portable jumper battery to power the jack to retract. If I had to do all 4, that would be my choice.
Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI