Ray260 installation

I will be installing the ray260 with a second handset on a sailboat. I have been looking at all the documentation on the web and have not been able to find information on the length of the cables that connect the handset and the active speaker to the extenstion cables that will go to the black box. I will call this cable a Y cable. If I had the length info than I could determine how far away I could mount the speaker and handset from each other when I mount the items at the wheel station. This would also help when I mount the black box down below at the navstation. Again mounting the handset and speaker the length of the Y will help to determine if I will need an extension cable to get to the black box.

Thanks
George