Nope...pretty straightforward. You're basically gonna remove the shorepower cord from the transfer swich, & in it's place install the new pigtail chord that comes with the install kit. Then you'll but a female receptacle onto the shorepower chord end that came off the transfer switch, thus making it an extension chord.
Plug the pigtail into the Autoformer, the Autoformer into the new female receptacle, then the male end of your shorepower chord into the post as you've always done.
The new female receptacle gets mounted to a wall. Be sure to mount it in the correct orientation so you can plug into it! (Please don't ask how I know