here is another picture from Navsource from the decomm postmark for USS Sculpin, it has a crude but accurate layout of the ship. You can again see where the torpedo tubes are at in the bow, the quarters of the bow that are blocked off above and below the torpedo tubes are where the sonar was located. Kind of related to the Russian "chin" sonar array layout that they usually use instead of a spherical array.
http://www.navsource.org/archives/08/0859006.jpg
One of the other things puzzled people about the scorpion is weather the masts in the sail were forced up when the sub imploded or weather the Scorpion was at comms depth when the incident occured. That was the one theory with the trash unit that had given some problems in the past, if it failed and became open to the sea, even at comms/periscope depth it would have caused massive flooding and a possible battery explosion. The only thing that does not make sense about that would be IIRC the trash unit was in the middle of the boat and if their had of been flooding there or an explosion of the battery, that compartment would not have imploded.