Interestingly enough, the flyback is much easier to install than even a run-of-the-mill Wells Gardner K7000. The key is the 3 wires pins coming off the bottom of the flyback should be positioned for insertion first. Then carefully push the flyback so that the other U-pins align to the other holes. Also note, the anode wire and the two wires going into the neck on the OG flyback are extra long. They need to be because the chassis sits so low inside the cab. But the Chinese flyback's anode and neck wires are plenty long enough for the job with the Windy II.
I got a few extra of these FB's. $55+shipping if anyone needs one.