Hey, guys. The Seacam housing (if outfitted with Nikonos bulkheads) comes with 5 of the 6 hotshoe pins installed. You can simply pull out the pins, however, so it's very easy to remove all of the pins except for the one you need (in addition to ground).
So you have two solutions, if you are using Ike strobes:
1) buy these cords: http://www.ikelite.com/web_pages/sync_cord_d1x.html
2) pull out three of the pins and save them for future use