No real images of the setup, but it's pretty self-explanatory as long as you have the same y-splitter I used (one in/two-out).
First I severed the 24v pin on ONE of the y-splitter OUT ends
(so one side will still get 24v to the kick panel for the actual diag tools).
Sealed the live 24v wire where it is cut
Tapped into the output side of that same wire and connected a 12v source.
(this side will connect to the Bluefire and provide 12v)
Open the driver side left kick panel.
Disconnect the main diag port feed from the back of the panel
Re-attach main diag feed to the input side of the y-splitter.
Plug the 24v output cable (unmodified end) from the y-splitter into the back of the kick panel.
Plug the 12v output end of the y-splitter into the Bluefire.
Test it all out to confirm the Bluefire is happy.
Button it up.
*I ran a 12v wire from the breaker panel to a new 4-output fuse block to provide 12v to that side of the dash for various reasons
*and be sure to fuse your 12v power source before reaching the splitter
Basically, this: