This is like swimming in Jello
First, in talking with a major strobe manufacturer, the Olympus TTL format (electronically) is proprietary (I was looking for an alternative top side unit).....meaning that the logic used from camera to strobe to auto-quench has not been released to 3rd parties. Another strobe manufacturerthinks they have deciphered this and has produced a logic chip which seems to work properly....but this is land based. As far as I know, none of the BIG name marine strobe manufacturers have wanted to takle this slippery slope
Any water tight elctrical bulk head connector could be used on any housing, I suppose. You need the pin-outs for the particular strobe you are using and the pin-outs for the hot shoe on the camrea. Then you need a mating connector for the hot shoe. If you've pinned out correctly, AND there is nothing internal to the strobe electronics which would casue a problem, the strobe should, in theory, be able to be used as a "slave"....If anything electronically/electrically is amiss (ie bad pin-out, bad connection, strobe anomoly) you fry the camera
Seems like a lot of risk for a user to assume in re-inventing the wheel
I'd call S&S or Ikelite, and see what they think....I'm sure Olympus is going to be no help