Yes, I asked @f150chief about this a couple months ago and he said the 754-01-01 xx6x values map the same as 754-01-01 xx3x values. So what they have in 754-01-01 should be correct/fine for their Fusion Energi.
I'm still curious/skeptical that they have properly-functioning value charging profiles and go times, because the screenshot that was provided looks exactly the same as mine looked when I had a J TCU installed (and those functions did not work). Not saying it can't be made to work (and indeed I hope it can) but what I have seen so far doesn't seem to show it.
Please keep us updated on your progress, @JoSS!