On the Ike site, it says manual only, no TTL
"The Fiber Optic Adapter converts the electrical bulkhead of any Ikelite DS Substrobe into a fiber optic port. This adapter is a manual exposure (non-TTL) trigger only. The strobe's output must be adjusted using the manual power settings built into the strobe (varies by model)."
The new Ikelite Fiber Optic Adapter for their DS strobes is here:
It does not do TTL, only manual control, so you have to set the strobe for manual flash. But no more electrical cable, and one less O-ring.
Alas, most of Ikelite's DSLR housings do not allow the flash to raise and fire. So this new Fiber Optic Adapter is mainly for using Ikelite strobes on Point and shoot Cams, I guess. I think I saw a circuit for a LED flasher that sits in the hotshoe and might be able to trigger this, but can't recall where now.