As only the late E series lenses had electrical connections and only the 200 series body had matching connections and AFAIK no accessory winders or finders ever had a hot shoe you are down to a cable connection.
The databus connection, again AFAIK, does not carry the flash sync signal anyway as with the E lens and the CF adapter combination the PC cable is still required for flash sync on the H body.
If you use a cold shoe and cable some triggers, not an expert but ISTR that PW do for example, short out on a cold shoe, I would ask/test first, oops see you ordered one. You can run PC to an external hotshoe but the cold you have ordered may work.
Good luck.