I have the part that Jean described laying around from times past, Part No. 4302. I've gone to FO and no longer need it. I understand that it's only for Nikon cameras but that may no longer be correct. I used it with a Ikelite TTL Dual sync cord as Jean described. It can be used in either TTL or manual flash mode.
I think that you might actually have a 4301 TTL converter which is meant to plug into a housing equipped with an Ikelite strobe connector, what you need is the 4302 (see picture) which has a Nikonos male connector on one end, and on the top of the small barrel is a female Ikelite in which you connect your 4103.52 Dual sync cord.