Got the VFD hooked up, jury rigged a DPDT toggle switch for the time being. Will swap it out with a proper switch once I order one.
It's actually pretty neat that it controls speed by varying frequency to the motor, running the 3 ph motor on 220VAC single/split phase.
Here's a short video.
https://www.youtube.com/watch?v=hjkWge5BEkU