Evinrude Power Pilot Control, Johnson Motor

[siox12]

Members, I have a 1979 Johnson 35hp with a Evinrude Power Pilot Control.
I need to change the control cables but cannot get the control box open to take the cables out so I can order some new ones. I have unscrewed every screw on the front of the control and also the Allen screw on the back of the control that is in the middle of a strange conical inset on the back. The ring nut around the key hole has been loosened also. The two halves separate a little but that is all. I do not want to use my super human strength and rip it asunder as I fear it will break. What to do????
Thanks for the wiring diagram that enabled my wife and I to rewire the motor this past weekend. It started right up after sitting for two years

Soon to Be Wet,
Kevin

[boats.net]

Should just have to remove control from boat and remove the screws in side of control box and side should come off.

[gwells9@cfl.rr.com]

related question

I have an 86 OMC remote control with a tilt trim that has had it. It is too costly to replace it so I am removing it and placing tilt trim on CC next to gauge. How do I emove the tilt trim 0329873 plastic piece? It is the hex screw on the back of the controller? 1986 90hp Johnson w/OMC controller (J90TLCDC). G Wells