There were 3 versions of the Cal 34. I sailed on a Mark 1. I don't know if the other versions are different. The one I'm familiar with just has a hole in the deck under the mast. If I remember right, that hole is hidden in the cabin by a decorative piece of wood that has a U channel cut in it to contain the wires. I think it was nailed onto the compression post.
Hi boeing1, if you wouldn't mind sending me the parts pic and a link to the seal replacement video that would be great! My email is johnson.mitchell at gmail dot com for Sorry for spelling it out but for some reason it won't let me send the message with my address written normally.